Saccades that consistently over- or undershoot their targets gradually become smaller or larger, respectively. The signal that elicits adaptation of saccade size is a difference between eye and target positions appearing repeatedly at the ends of saccades. Here we describe how visual error size affects the size of saccade adaptation. At the end of each saccade, we imposed a constant-sized error by moving the target to a specified point relative to eye position. We tested a variety of error sizes imposed after saccades to target movements of 6, 12, and 18 degrees. We found that the size of the gain change elicited in a particular experiment depended on both the size of the imposed postsaccade error and on the size of the preceding target movement. For example, imposed errors of 4-5 degrees reduce saccades tracking 6, 12, and 18 degrees target movements by an average of 18, 35, and 45%, respectively. The most effective errors were those that were 15-45% of the size of the initial target eccentricity. Negative errors, which reduce saccade size, were more effective in changing saccade gain than were positive errors, which increased saccade size. For example, for 12 degrees target movements, negative and positive errors of 2-6 degrees changed saccade gain an average of 35 and 8%, respectively. This description of the relationship between error size and adaptation size improves our ability to adapt saccades in the laboratory and characterizes the error sizes that will best drive neurons carrying the adaptation-related visual error signal.

Our data suggests that using video-assisted laryngoscopy for intubation puts a patient at significantly greater risk for injury compared to direct laryngoscopy. Laryngoscope, 2016 127:349-353, 2017.

IMPORTANCE Synkinesis is the involuntary movement of 1 area of the face accompanying volitional movement of another; it is commonly encountered in patients affected by facial palsy. Current treatments for synkinesis include biofeedback for muscular retraining and chemodenervation via the injection of botulinum toxin. Chemodenervation is effective in reducing unwanted muscle movement, but it requires a commitment to long-term maintenance injections and may lose effectiveness over time. A permanent solution for synkinesis remains elusive. OBJECTIVE To evaluate masseteric-to-facial nerve transfer with selective neurectomy in rehabilitation of the synkinetic smile. DESIGN, SETTING, AND PARTICIPANTS In this case series, 7 patients at a tertiary care teaching hospital underwent masseteric-to-facial nerve transfer with selective neurectomy for synkinesis between September 14, 2015, and April 19, 2018. The medical records of these patients were retrospectively reviewed and demographic characteristics, facial palsy causes, other interventions used, and changes in eFACE scores were identified. INTERVENTION Masseteric-to-facial nerve transfer. MAIN OUTCOMES AND MEASURES Changes in eFACE scores (calculated via numeric scoring of many sections of the face, including flaccidity, normal tone, and hypertonicity; higher scores indicate better function and lower scores indicate poorer function) and House-Brackmann Facial Nerve Grading System scores (range, 1-6; a score of 1 indicates normal facial function on the affected side, and a score of 6 indicates absence of any facial function [complete flaccid palsy] on the affected side).RESULTS Among the 7 patients in the study (6 women and 1 man; median age, 49 years [range, 41-63 years]), there were no postoperative complications; patients were followed up for a mean of 12.8 months after surgery (range, 11.0-24.5 months). Patients experienced a significant improvement in mean (SD) eFACE scores in multiple domains, including smile (preoperative, 65.00 [8.

Participants were not able to identify all of the risks associated with adenotonsillectomy. There was no difference in identification of risks associated with adenotonsillectomy among different modalities of counseling. Participants retained more information when there was less time between the preoperative counseling and day of surgery.

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