Klüver-Bucy Syndrome Following Traumatic Brain Injury: A Systematic Synthesis and Review of Pharmacological Treatment From Cases in Adolescents and Adults.

Klüver-Bucy syndrome (KBS) is a rare clinical presentation following traumatic brain injury (TBI). Symptoms include visual agnosia, placidity, hyperorality, sexual hyperactivity, changes in dietary behavior, and hypermetamorphosis. The purpose of this article was to identify and synthesize the available evidence from case reports and case series on the treatment profile of KBS among adolescents and adults after TBI. Four bibliographic databases (MEDLINE OVID, EMBASE, PsycINFO, and SCOPUS) were searched for relevant literature. No date or language restrictions were applied. All case reports containing original data on KBS following TBI among adolescents and adults were included. Articles were evaluated, and data were extracted according to predefined criteria. The literature search identified 24 case reports of KBS post-TBI published between 1968 and 2017. Most case subjects were male (70.1%), and the mean age at injury was 25.1 years (range, 13-67 years). Injury to one or both temporal lobes occurred in most cases. Inappropriate sexual hyperactivity was the most common KBS symptom, followed by a change in dietary behavior and hyperorality. Visual agnosia was the least reported. In 50% of cases, the patient fully recovered from KBS. One-half of all participants described pharmacological management; the most common medication prescribed was carbamazepine. Overall, there was a lack of data available on pharmacotherapy initiation and duration. The complex presentation of KBS presents challenges in terms of treatment options. Although overall individuals who were prescribed carbamazepine had positive outcomes, given the reliance on case reports, it is difficult to make a definitive recommendation to guide clinical practice.

Mesiotemporal Disconnection and Hypoactivity in Klüver-Bucy Syndrome: Case Series and Literature Review.

OBJECTIVE: Klüver-Bucy syndrome (KBS) is often perceived as rare and limited to cases with bilateral amygdala destruction. In fact, various alternate mechanisms may be involved, warranting exploration of the syndrome's presentation, pathophysiology, prognosis, and management. DATA SOURCES: Clinical management and the electronic medical records were examined for 2 patients diagnosed with partial KBS (ICD-10 F07.0) after experiencing ≥ 3 of the following: placidity, indiscriminate dietary behavior, hyperorality, hypersexuality, visual agnosia, and hypermetamorphosis. A literature search was performed in April 2015 by using the keyword Kluver-Bucy in PubMed and Ovid databases for English language publications since inception. Additionally, the authors reviewed the reference list of these publications in order to identify additional reports. STUDY SELECTION: Studies were included if they had information about presentation, pathophysiology, syndrome treatment or management, and course of KBS. DATA EXTRACTION: Information about our KBS cases was obtained by reviewing electronic medical records and by direct observation of the patients. A total of 186 (PubMed) and 137 (Ovid) publications were identified in each database. We ultimately reviewed 109 articles containing information about KBS, finding 51 publications addressing relevant aspects of this syndrome. RESULTS: The first case demonstrates KBS secondary to mesiotemporal structural atrophy, and the second illustrates transient KBS due to functional, postictal, hypoactivity within such structures. Literature review and discussion regarding both prognosis and treatment of KBS follows. CONCLUSIONS: Klüver-Bucy syndrome may be underreported due to a limited understanding of the syndrome as one necessitating bilateral amygdaloid destruction. The syndrome can be seen with damage/hypofunction of the hippocampal-amygdaloid complex and its projections. The prognosis of KBS is variable, and its treatment is based on a combination of environmental and pharmacologic measures.

Mucopolysaccharidosis Type IIIA presents as a variant of Klüver-Bucy syndrome.

Mucopolysaccharidosis Type IIIA (MPS IIIA) is a neurodegenerative disease with behavioral symptoms unique among the mucopolysaccharidoses. Children with MPS IIIA reportedly mouth things, explore novel environments almost continuously, disregard danger, and empathize/socialize and comply less with parents. These characteristics resemble Klüver-Bucy syndrome (K-Bs). To test the K-Bs hypothesis, 30 children with MPS IIIA were compared to 8 "posttransplant" mucopolysaccharidosis Type IH patients in an experimental "risk room." The room contained attractive and mildly frightening objects, exposure to a 92-dB startle noise triggered by contact with an attractive toy, mother's return after a brief absence, and compliance with her cleanup directive. Children with MPS IIIA: (a) left mother sooner, (b) wandered more, (c) were more likely to approach frightening objects, (d) were less likely to respond to loud noise with whole body startle, (e) were less likely to avoid the toy associated with the startle noise, (f) interacted less with mother upon her return, and (g) complied less with her cleanup command. K-Bs is associated with loss of amygdala function. Brain magnetic resonance imaging (MRI) of a subset of the children with MPS IIIA showed volume loss that was greater in the amygdala than in the hippocampus; only amygdala loss correlated with reduced fearfulness. MPS IIIA may be the first identified pediatric disease presenting systematically as a K-Bs variant. If validated by further studies, the K-Bs hypothesis of MPS IIIA would provide important clinical and theoretical information for the guidance of families as well as markers for natural disease progression and treatment effects.

Effects of neonatal medial versus lateral temporal cortex injury: theoretical comment on Malkova et al. (2010).

The article by Malkova, Mishkin, Suomo, and Bachevalier (2010, this issue) adds an important piece to our understanding of the role of the medial versus lateral temporal regions in socioemotional behavior. In their paper, they evaluate the effect of infant and adult amygdala lesions and infant inferotemporal cortex lesions on the social interactions of monkeys in infancy and adulthood. The results show that medial temporal lesions performed in infants produce greater effects on socioaffective behavior than similar lesions in adulthood and that infant monkeys with inferotemporal lesions exhibit social deficits that are resolved by adulthood. These results are relevant to three significant issues: (1) the role of the medial temporal and lateral temporal cortex in the symptoms of the Kluver-Bucy syndrome; (2) the role of age at injury in behavioral change after cerebral injuries; and (3) the importance of lesion locus and behavioral measure for recovery from infant and adult cerebral injury.

Kluver-Bucy syndrome, hypersexuality, and the law.

A 51-year-old right-handed man developed hypersexuality after a second right temporal lobectomy to treat epilepsy. His hypersexuality started with increased marital intercourse and masturbation but he later downloaded child pornography. Hyperphagia and distractibility, other features of the Kluver-Bucy syndrome, also developed. Resection of the amygdala and/or temporal lobe neocortical areas that inhibit other limbic areas may contribute to the pathogenesis of hypersexuality. Neurological factors mitigate the criminal responsibility for hypersexual activity in patients with Kluver-Bucy syndrome. Most previously reported patients were never charged with a crime despite uninvited physical contact in some instances. Our patient was convicted and imprisoned.

[The case of temporal lobes dysfunction in atypical psychiatric episodes]. / Dysfonctionnement des lobes temporaux et tableau psychiatrique atypique : à propos d'un cas.

CASE-REPORT: A thirty-seven-year-old man, with temporal epilepsy, had transient, atypical psychiatric states with periods of time without any symptom. These episodes included hypersexuality with qualitative changes of sex drive, obscene behavior, exhibitionism, masturbation and modified sexual orientation. Blunted affect, inability to recognize significant persons (visual agnosia) were also detected. Magnetic resonance imaging was normal and interictal single-photon emission computed tomography (SPECT) showed decreased cerebral perfusion in both temporal lobes. DISCUSSION: The principal hypothesis is a Klüver-Bucy syndrome (KBS). In animals and human beings, this syndrome can be produced by bilateral temporal lobectomy. It is characterised by hypersexuality, visual agnosia, strong oral tendency, dietary changes, hypermetamorphosis and blunted affect. A minimum of three KBS elements suggests bilateral temporal dysfunction and supports the diagnosis. The syndrome may occur in herpes encephalitis, head trauma, Pick disease and temporal epilepsy. A single case of a patient, without any evidence for structural lesion in temporal lobes, is presented with many KBS symptoms, behavioral changes being due to complex partial seizure. Bitemporal dysfunction for this patient was confirmed by SPECT scan. On the other hand, the detected behavioral changes cannot be explained by temporal epilepsy alone. Postictal hypersexuality in temporal epilepsy consists in sexual arousal but not sexual aberrations as found in KBS. CONCLUSION: KBS following complex partial status epilepticus is a rare phenomenum. The case described here shows how atypical psychiatric episodes can cover complex neurologic disorders.

Síndrome de Klüver-Bucy por lesión frontal / No disponible

No disponible

Alzheimer abnormalities of the amygdala with Klüver-Bucy syndrome symptoms: an amygdaloid variant of Alzheimer disease.

BACKGROUND: Neurofibrillary tangles and beta-amyloid plaques have been observed in the amygdala in Alzheimer disease. A disproportionate abundance of this abnormality in the amygdala may cause behavioral symptoms similar to Klüver-Bucy syndrome. OBJECTIVES: To describe an atypical behavioral presentation of Alzheimer disease and to review the literature on the subject. DESIGN: Case study. SETTING: Outpatient specialty clinic. PATIENT: A 70-year-old man with progressive behavioral symptoms of hyperorality, hypersexuality, hypermetamorphosis, visual agnosia, hyperphagia, and apathy who died at age 77 of asphyxiation on a foreign object. MAIN OUTCOME MEASURES: Clinical symptomatology, brain imaging, and neuropathology. RESULTS: The pathologic diagnosis was Alzheimer disease with abundant tangles and plaques in the lateral amygdala. CONCLUSIONS: This case represents a variant of Alzheimer disease with prominent amygdala abnormalities and a Klüver-Bucy phenotype that was misdiagnosed as frontotemporal dementia. Clinical and imaging findings that may aid in accurate diagnosis are reviewed.

To lose the frame of action: a selective deficit in avoiding unpleasant objects following a unilateral temporal lobe lesion.

Studies on emotion and its neurobiology have been far more focused on the recognition of emotion than on actions that are caused by emotional states. We investigate the performance of a patient, HS, with a unilateral lesion to the left temporal pole and orbito-frontal cortex (OFC) (including left amygdala), on a well-established approach/avoid task that taps into emotion-driven action. The striking finding of the present study is a remarkable, and selective, slowing of HS's avoidance of unpleasant items in her (impaired) contralesional field. This finding suggests that the left temporal lobe and OFC structures, including the amygdala, appear to be involved in the action component of emotion, specifically in avoiding negative items.

[Klüver-Bucy syndrome. Seven year follow-up of one patient]. / Síndrome de Klüver-Bucy. Seguimiento de un paciente durante 7 años.

OBJECTIVE: To present a left-handed patient who had an acute encephalopathy, possibly of viral etiology, followed by remote and recent memory loss, several types of apraxia and emotional disturbance, without any motor abnormalities. He had cerebral lesions that involved both temporal lobes and other brain regions. All features corresponded to the Klüver-Bucy syndrome. After a seven year follow-up, no improvement of the neurological and neuroradiological, mainly by magnetic resonance imaging (MRI) features was observed. CASE REPORT: A 14 year-old left-handed boy suffered sudden onset of fever (40.4 degrees C), headache, vomiting, focal and generalized seizures and coma. After the acute illness, the patient had severe neurological sequels consisting in total loss of memory without any capacity to recognize persons (including family members) and remote events and he was not capability of remember hardly anything that he was taught after his disease, these alterations continued almost completely during the seven years (from 14 to 21 years) that we followed him up. The only abilities that he conserved in similar conditions to those prior to his acute disease were his capacity to swim (including the style of jumping into the water), bike riding, playing football, dominoes, cards, etc., which he had learned during his childhood, to say the numbers and the alphabet letters rapidly by heart (without knowing them) and to avoid cars on the street. MRI showed post-inflammatory lesions in the temporal and the parieto-temporo-occipital regions bilaterally (cortical and subcortical regions) and in the left occipital region. He presented almost all types of apraxia. CONCLUSION: Klüver-Bucy syndrome, which can be secondary to more than 50 different causes, not only presents remote memory loss but also recent memory loss as in our patient, who appeared to be isolated from the surrounding world. Motor function and automated activities learned before the acute brain illness were not affected and could be recovered. Etiology, location and extent of the anatomic brain lesion appear to be the most important prognostic conditions.

Síndrome de Klüver-Bucy. Seguimiento de un paciente durante 7 años / Klüver-Bucy syndrome. Seven year follow-up of one patient

Objetivo. Presentar a un paciente zurdo que sufrió un proceso agudo cerebral, posiblemente una encefalitis vírica, que le dejó alteraciones de la memoria para los hechos remotos y recientes, diferentes tipos de apraxia y falta de reacción afectiva, sin alteraciones motrices. Existía lesión cerebral en ambos lóbulos temporales y en otras zonas, todo ello compatible con síndrome de Klüver-Bucy. Su seguimiento durante 7 años apenas mostró mejoría de las alteraciones neurológicas y neurorradiológicas, principalmente resonancia magnética (RM). Caso clínico. Hombre que a los 14 años de edad presentó un cuadro brusco de fiebre alta (40,4 oC), cefalea, vómitos, convulsiones y coma. Tras pasar el proceso agudo, el paciente presentó secuelas neurológicas graves consistentes en absoluta falta de memoria sin capacidad alguna de reconocimiento de las personas (incluidos los miembros de la familia) y de hechos remotos, e incapacidad de recordar apenas nada de lo que se le iba enseñando tras su enfermedad, continuando con estas alteraciones, casi en su totalidad, a lo largo de los 7 años (desde los 14 hasta los 21 años) que seguimos su evolución. Sólo conservó, en condiciones similares a como lo realizaba antes de su enfermedad aguda, la capacidad para nadar (incluida la forma perfecta de tirarse al agua), para correr en bicicleta, jugar al fútbol, al dominó, a las cartas, etc., que él aprendió durante su infancia, decir los números y las letras del abecedario «de carrerilla» (sin reconocerlos cuando se le ponían delante) y para sortear los coches en la calle. La RM cerebral mostraba lesiones postinflamatorias en ambos lóbulos temporales, en ambas regiones parietotemporooccipitales (zonas corticales y subcorticales) y en la región occipital izquierda. Presentaba casi todos los tipos de apraxia. Conclusión. El síndrome de Klüver-Bucy, que puede ser secundario a más de 50 causas, no se limita a la pérdida de la memoria para los hechos remotos, sino que puede presentar también incapacidad para rememorar los conocimientos recientes, quedando los pacientes aislados mentalmente del mundo exterior. Su motricidad y la actividad automatizada, aprendida en épocas anteriores al proceso agudo que causó su encefalopatía, no fueron afectados y pudieron recuperarse. La etiología junto con la localización y extensión de las lesiones cerebrales parecen los factores pronósticos más importantes (AU)

Objective: To present a left-handed patient who had an acute encephalopathy, possibly of viral etiology, followed by remote and recent memory loss, several types of apraxia and emotional disturbance, without any motor abnormalities. He had cerebral lesions that involved both temporal lobes and other brain regions. All features corresponded to the Klüver-Bucy syndrome. After a seven year follow-up, no improvement of the neurological and neuroradiological, mainly by magnetic resonance imaging (MRI) features was observed. Case Report: A 14 year-old left-handed boy suffered sudden onset of fever (40.4 degrees C), headache, vomiting, focal and generalized seizures and coma. After the acute illness, the patient had severe neurological sequels consisting in total loss of memory without any capacity to recognize persons (including family members) and remote events and he was not capability of remember hardly anything that he was taught after his disease, these alterations continued almost completely during the seven years (from 14 to 21 years) that we followed him up. The only abilities that he conserved in similar conditions to those prior to his acute disease were his capacity to swim (including the style of jumping into the water), bike riding, playing football, dominoes, cards, etc., which he had learned during his childhood, to say the numbers and the alphabet letters rapidly by heart (without knowing them) and to avoid cars on the street. MRI showed post-inflammatory lesions in the temporal and the parieto-temporo-occipital regions bilaterally (cortical and subcortical regions) and in the left occipital region. He presented almost all types of apraxia. Conclusion: Klüver-Bucy syndrome, which can be secondary to more than 50 different causes, not only presents remote memory loss but also recent memory loss as in our patient, who appeared to be isolated from the surrounding world. Motor function and automated activities learned before the acute brain illness were not affected and could be recovered. Etiology, location and extent of the anatomic brain lesion appear to be the most important prognostic conditions (AU)

Klüver-Bucy syndrome following status epilepticus associated with hepatic encephalopathy.

Described here is the case of a patient with liver cirrhosis who developed bilateral temporo-occipital lobe lesions on MRI and Klüver-Bucy syndrome following status epilepticus. Herpes encephalitis, paraneoplastic syndrome, Hashimoto's encephalopathy, reversible posterior leukoencephalopathy syndrome, mitochondrial encephalomyopathy, lactic acidosis, and strokelike episode syndrome were judged not to be involved on the basis of laboratory results. The possible cause of the temporo-occipital lesions on MRI in this patient was cortical damage related mainly to status epilepticus and partially to coexisting hepatic encephalopathy.

[The amygdaloid complex and its implication in psychiatric disorders]. / El complejo amigdalino humano y su implicación en los trastornos psiquiátricos.

The amygdaloid complex is a group of nuclei located deep in the temporal lobe and closely involved in the limbic system. Its alteration has been associated with some psychiatric processes. In this article, an overall review was made of the published data concerning the amygdaloid complex in the most common psychiatric diseases. A damaged amygdaloid complex is commonly observed, that in the Klüver-Bucy syndrome presents the fullest expression. A decrease in the amygdaloid complex of schizophrenic patients has been observed. This finding was found bilaterally in men whereas in women it was only located in one hemisphere. This finding suggests that morphometric alterations in the amygdaloid complex are more diffuse and more severe in men with schizophrenia. This subcortical complex is larger in children with autism, but not in adolescents, in whom the amygdaloid complex volume matches the normal volume of an adolescent or an adult without this pathology. However, neuroanatomical studies have shown microscopic alterations. In patients with mood disorders, it has been reported that the left amygdaloid complex presents a lesser volume. Moreover, in frontotemporal dementia and Alzheimer disease a slight amygdaloid atrophia was found related to the healthy controls. It can be concluded that the amygdaloid complex is involved in several psychiatric processes, due to structural or functional damage. However, more studies are still needed in order to delimitate the real influence of the amygdaloid complex in these disorders.

El complejo amigdalino humano y su implicación en los trastornos psiquiátricos / The amygdaloid complex and its implication in psychiatric disorders

El complejo amigdalino es un conjunto de núcleos que se localizan en la profundidad del lóbulo temporal, y que guardan estrecha relación con el sistema límbico. Su alteración se ha asociado a un gran número de procesos psiquiátricos. En este artículo se pretende hacer una revisión de lo publicado en referencia a la implicación amigdalina en trastornos psiquiátricos comunes. En ellos se observa un complejo amigdalino alterado, siendo su máxima expresión el síndrome de Klüver-Bucy. En pacientes esquizofrénicos se ha observado una reducción del volumen amigdalino, bilateral en varones y unilateral en mujeres. Esto sugiere que las alteraciones morfométricas del complejo amigdalino están más extendidas en varones esquizofrénicos. El complejo amigdalino está aumentado en niños autistas, no siendo así en adolescentes, donde se iguala al volumen de cualquier adolescente o adulto sano. Sin embargo, estudios neuroanatómicos han demostrado patología microscópica. En los pacientes con trastornos en el estado de ánimo, se observa una cierta tendencia a presentar un complejo amigdalino izquierdo de menor volumen. El volumen amigdalino de los grupos con demencia frontotemporal y enfermedad de Alzheimer era diferente a los del grupo de control, y se ha visto una predisposición al incremento de la atrofia amigdalina. Se puede afirmar que el complejo amigdalino está implicado en numerosos procesos psiquiátricos, tanto por daño estructural de dicho complejo como por daño funcional. Sin embargo, hacen falta más estudios para delimitar la influencia real del complejo amigdalino en dichos trastornos

The amygdaloid complex is a group of nuclei located deep in the temporal lobe and closely involved in the limbic system. Its alteration has been associated with some psychiatric processes. In this article, an overall review was made of the published data concerning the amygdaloid complex in the most common psychiatric diseases. A damaged amygdaloid complex is commonly observed, that in the Klüver-Bucy syndrome presents the fullest expression. A decrease in the amygdaloid complex of schizophrenic patients has been observed. This finding was found bilaterally in men whereas in women it was only located in one hemisphere. This finding suggests that morphometric alterations in the amygdaloid complex are more diffuse and more severe in men with schizophrenia. This subcortical complex is larger in children with autism, but not in adolescents, in whom the amygdaloid complex volume matches the normal volume of an adolescent or an adult without this pathology. However, neuroanatomical studies have shown microscopic alterations. In patients with mood disorders, it has been reported that the left amygdaloid complex presents a lesser volume. Moreover, in frontotemporal dementia and Alzheimer disease a slight amygdaloid atrophia was found related to the healthy controls. It can be concluded that the amygdaloid complex is involved in several psychiatric processes, due to structural or functional damage. However, more studies are still needed in order to delimitate the real influence of the amygdaloid complex in these disorders

Fluctuating Kluver-Bucy syndrome in a child with epilepsy due to bilateral anterior temporal congenital malformations.

An 11-year-old boy with epilepsy due to congenital bilateral anterior temporal lobe malformations presented with fluctuating Kluver-Bucy syndrome (KBS). Since the age of 2, he had experienced clusters of three or four daily complex partial seizures over 2-3 days in a month, followed by a seizure-free interval of 3-4 weeks. During the seizure-free period, the patient exhibited hyperorality, sniffing, irritability alternating with placidity, anxiety, unsolicited sexual gestures, and unusual calmness after eating. KBS features escalated up to the onset of the seizure cluster, and remitted after the seizures. Brain MRI revealed bilateral anterior temporal cortical dysplasia with enlarged and dysmorphic amygdalar-hippocampal complex. Brain [(18)F]fluorodeoxyglucose positron emission tomography PET showed bilateral anterior and mesial temporal hypometabolism. Video/EEG monitoring revealed independent right and left temporal lobe seizures. This is the first reported case of KBS due to congenital bitemporal malformations. Also, KBS behavior phenotype in this patient fluctuated, with escalation during the seizure-free period and remission induced by the monthly seizure cluster. This fluctuating pattern could represent forced normalization.

Working memory for conjunctions relies on the medial temporal lobe.

A prominent theory of hippocampal function proposes that the hippocampus is importantly involved in relating or binding together separate pieces of information to form an episodic representation. This hypothesis has only been applied to studies of long-term memory because the paradigmatic view of the hippocampus is that it is not critical for short-term forms of memory. However, relational processing is important in many working memory tasks, especially tasks using visual stimuli. Here, we test the hypothesis that the medial temporal lobes are important for relational memory even over short delays. The task required patients with medial temporal lobe amnesia and controls to remember three objects, locations, or object-location conjunctions over 1 or 8 s delays. The results show that working memory for objects and locations was at normal levels, but that memory for conjunctions was severely impaired at 8 s delays. Additional analyses suggest that the hippocampus per se is critical for accurate conjunction working memory. We propose that the hippocampus is critically involved in memory for conjunctions at both short and long delays.