Electromyograms

Nora Klemke 1/25/2012 8-10:50 W HN-1 and HN-2 1. The goal of this lab is to help understand a reflex arc, study the time taken between a stimulus and a response, how the spinal cord and peripheral nerves function, and how to measure and record response time related to a stimulus using the Labscribe software. For the second part of the lab, electromyograms will be triggered and recorded in order to study the Achilles and patellar stretch reflex and the reflex arc. Also, to understand nerve conduction velocity, EMG, and motor control. 2. The objectives of the first part of this lab is to observe and measure the reaction time to visual cues and compare this to the reaction time to auditory cues, to determine which stimulus would cause a longer reaction time, and to compare subjects’ reaction times by analyzing the data collected. For the second part of the lab, we will observe which muscle groups are involved in plantar flexion and in dorsiflexion of the ankle, if different stimulus strengths change the reflex time, and to determine conduction time from tendon tap to response of the gastrocnemius muscle in the Achilles reflex arc and of the quadriceps muscle in the patellar tendon reflex arc by recording the results using the Labscribe software and analyzing the data. 3. Experiment one hypothesis: The response time to visual stimulus will be slower than that of the auditory stimulus
Experiment two hypothesis: The Achilles tendon response will be slower than the patellar response.
The patellar reflex will decrease when the quadriceps is tensed
The Achilles reflex will increase with a heavier tap. 4.Hypothesis