Acquisition and generalization of cough trigger beliefs in allergic rhinitis.

In allergic conditions, trigger identification is often inaccurate, and may be influenced by pre-existing beliefs. In this study, we investigated the acquisition and generalization of symptom trigger beliefs in individuals with allergic rhinitis (n = 24) and control participants (n = 24). In a lab-based trigger acquisition task, unique exemplars of two trigger categories were either paired with saline inhalation (CS- category) or citric acid inhalation (CS+ category). The next day, we tested recognition and symptom expectancy for CS category exemplars and exemplars of novel trigger categories. Participants acquired differential symptom expectancies for CS+ compared to CS- exemplars, with faster acquisition in participants with rhinitis. Differential symptom expectancies persisted the next day, and generalized to novel trigger categories, with stronger generalization in rhinitis vs. control participants. These patterns of acquisition and generalization suggest that overgeneralization of trigger beliefs may complicate trigger identification in participants with allergic conditions.

Distance in motion: response trajectories reveal the dynamics of number comparison.

Cognitive and neuroscientific evidence has challenged the widespread view that perception, cognition and action constitute independent, discrete stages. For example, in continuous response trajectories toward a target response location, evidence suggests that a decision on which target to reach for (i.e., the cognition stage) is not reached before the movement starts (i.e., the action stage). As a result, instead of a straight trajectory to the correct target response, movement trajectories may curve toward competing responses or away from inhibited responses. In the present study, we examined response trajectories during a number comparison task. Participants had to decide whether a target number was smaller or larger than 5. They had to respond by moving to a left or a right response location. Replicating previous results, response trajectories were more curved toward the incorrect response location when distance to 5 was small (e.g., target number 4) than when distance to 5 was large (e.g., target number 1). Importantly, we manipulated the response mapping, which allowed us to demonstrate that this response trajectory effect results from the relative amount of evidence for the available responses across time. In this way, the present study stresses the tight coupling of number representations (i.e., cognition) and response related processes (i.e., action) and shows that these stages are not separable in time.

Facial contour restoration in Barraquer-Simons syndrome using two free TRAM flaps: Presentation of two case reports and long-term follow-up.

Barraquer-Simons syndrome, a disorder of unknown etiology, is characterized by a cephalothoracic lipodystrophy. We present 2 patients treated with a bilateral free transverse rectus abdominis myocutaneous (TRAM) flap to restore facial contour. Our technique of using a muscle component to fill the cheek defect was based on our experience with free muscle transfer in facial reanimation. In comparison with adipose tissue, muscle tissue does not show a tendency for ptosis because of its consistency and firm attachment of the muscle surface to the surrounding tissues. These cases demonstrate the possibility for the use of simultaneous dissection of the face and flaps, and the reliability of the vascular pedicle. The stability of the abdominal wall was secured by closure of the rectus sheath over Teflon mesh, which has been proven to prevent hernia. Our long-term follow-up demonstrates a stable symmetrical facial appearance.