The Influence of Parkinson\u27s Disease Symptoms on Repetitive Toe Tapping at High and Low Frequencies.

People with Parkinson\u27s Disease have impairments in repetitive movement. However, no one has quantified repetitive toe-tapping performance at different rates in persons with PD. Position of the toe and EMG of the tibialias anterior and gastrocnemius were collected while participants tapped at 70 beats per minute and 140 beats per minute. Results revealed that participants had greater impairment at the higher rate. The results of this data will inform future studies on the impact of impairments in repetitive movements on larger motor tasks such as gait

Cortical gamma-oscillations modulated by auditory–motor tasks-intracranial recording in patients with epilepsy

Human activities often involve hand-motor responses following external auditory–verbal commands. It has been believed that hand movements are predominantly driven by the contralateral primary sensorimotor cortex, whereas auditory–verbal information is processed in both superior temporal gyri. It remains unknown whether cortical activation in the superior temporal gyrus during an auditory–motor task is affected by laterality of hand-motor responses. Here, event-related Γ-oscillations were intracranially recorded as quantitative measures of cortical activation; we determined how cortical structures were activated by auditory-cued movement using each hand in 15 patients with focal epilepsy. Auditory–verbal stimuli elicited augmentation of Γ-oscillations in a posterior portion of the superior temporal gyrus, whereas hand-motor responses elicited Γ-augmentation in the pre- and postcentral gyri. The magnitudes of such Γ-augmentation in the superior temporal, precentral, and postcentral gyri were significantly larger when the hand contralateral to the recorded hemisphere was required to be used for motor responses, compared with when the ipsilateral hand was. The superior temporal gyrus in each hemisphere might play a greater pivotal role when the contralateral hand needs to be used for motor responses, compared with when the ipsilateral hand does. Hum Brain Mapp, 2010. © 2010 Wiley-Liss, Inc.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/78227/1/20963_ftp.pd

The Influence of Parkinson's Disease Symptoms on Repetitive Toe Tapping at High and Low Frequencies.

People with Parkinson's Disease have impairments in repetitive movement. However, no one has quantified repetitive toe-tapping performance at different rates in persons with PD. Position of the toe and EMG of the tibialias anterior and gastrocnemius were collected while participants tapped at 70 beats per minute and 140 beats per minute. Results revealed that participants had greater impairment at the higher rate. The results of this data will inform future studies on the impact of impairments in repetitive movements on larger motor tasks such as gait.</p