Assuntos
Doenças da Medula Espinal/diagnóstico por imagem , Xantomatose Cerebrotendinosa/diagnóstico por imagem , Adulto , Núcleos Cerebelares/diagnóstico por imagem , Pilares do Cérebro/diagnóstico por imagem , Ácido Quenodesoxicólico/uso terapêutico , Colestanotriol 26-Mono-Oxigenase/genética , Colestanol/sangue , Feminino , Humanos , Cápsula Interna/diagnóstico por imagem , Transtornos de Início Tardio , Imageamento por Ressonância Magnética , Medula Espinal/diagnóstico por imagem , Doenças da Medula Espinal/sangue , Doenças da Medula Espinal/tratamento farmacológico , Doenças da Medula Espinal/genética , Xantomatose Cerebrotendinosa/sangue , Xantomatose Cerebrotendinosa/tratamento farmacológico , Xantomatose Cerebrotendinosa/genéticaRESUMO
The crus haemorrhage is one of the main causes of carcass defects in Pekin duck processing houses. However, its pathologic features are currently unclear. In order to examine the injury to the hind limb veins and illustrate the pathologic characteristics of crus haemorrhage in Pekin ducks, a total of 68 Pekin ducks with crus haemorrhage (test group) and 10 unaffected ducks (control group) were collected in this study. Five ducks randomly selected from each group were examined by computed tomographic venography with 2.0â mm thickness, 120â kVp, and 90â mA. Pathological changes were observed macroscopically, and under a microscope and electron microscope. The computed tomographic venography results showed no differences in the main hind limb veins between Pekin ducks with crus haemorrhage and the control. Macroscopic results demonstrated that the haemorrhage only occurred in crural muscles, most frequently in musculus gastrocnemius and musculus tibialis cranialis. In severe cases, muscular rupture and multiple intermuscular blood clots could be observed. Histological analysis showed rupture of myofibers and massive red blood cells between muscle bundles. Besides, infiltration of connective tissues and inflammatory lesions could be seen. However, no differences were observed in other organs between these two groups. The main ultrastructural characteristics were myofibrillar rupture and split, accompanied by mitochondrial membrane disintegration and vacuolization. All these results indicate that the haemorrhage in crus is a focal myopathy with the characteristics of bleeding, rupture, and inflammatory lesions. Research highlights CTV was a feasible method to evaluate the hind limb veins in Pekin ducks. The focal myopathy presented here only affected crural muscles. The focal myopathy was characterized by bleeding, rupture and inflammatory lesions.
Assuntos
Pilares do Cérebro , Hemorragia Cerebral/veterinária , Patos , Doenças das Aves Domésticas/patologia , Animais , Pilares do Cérebro/diagnóstico por imagem , Pilares do Cérebro/patologia , Hemorragia Cerebral/diagnóstico por imagem , Hemorragia Cerebral/patologia , Feminino , Masculino , Flebografia/veterinária , Doenças das Aves Domésticas/diagnóstico por imagem , Tomografia Computadorizada por Raios X/veterináriaAssuntos
Movimentos da Cabeça/fisiologia , Transtornos da Motilidade Ocular/etiologia , Transtornos da Motilidade Ocular/reabilitação , Rotação , Inconsciência/complicações , Idoso , Córtex Cerebral/diagnóstico por imagem , Pilares do Cérebro/diagnóstico por imagem , Humanos , Imageamento por Ressonância Magnética , Masculino , Inconsciência/diagnóstico por imagemRESUMO
Functional transcranial Doppler (fTCD) is a useful medical imaging technique to monitor cerebral blood flow velocity (CBFV) in major cerebral arteries. In this paper, CBFV changes in the right and left middle cerebral arteries (MCA) caused by cognitive tasks, such as word generation tasks and mental rotation tasks, were examined using fTCD. CBFV recordings were collected from 20 healthy subjects (10 females, 10 males). We obtained both the raw CBFV signal and the envelope CBFV signal, which is the maximal velocity to gain more information about the changes and hemisphere lateralization in cognitive tasks compared to the resting state. Time, frequency, time-frequency, and information-theoretic features were calculated and compared. Sex effects were also taken into consideration. The results of our analysis demonstrated that the raw CBFV signal contained more descriptive information than the envelope signals. Furthermore, both types of cognitive tasks produced higher values in most signal features. Geometric tasks were more distinguished from the rest-state than verbal tasks and the lateralization was exhibited in right MCA during geometric tasks. Our results show that the raw CBFV signals provided valuable information when studying the effects of cognitive tasks and lateralization in the MCA.