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Lecture 9

Kinesiology 1080A/B Lecture Notes - Lecture 9: Histogram, Phantom Limb, Dysmelia

Course Code
Kinesiology 1080A/B
Matthew Heath

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Jan 11-20, 2015
January 22, 16
Lecture 9
Corticomotorneural activity is movement specific
Precision grip – highly sophisticated
Power – not sophisticated, all fingers grasp at once
Histogram (left graph) of the sum of activity of all the neurons are being recorded,
how much and how many are firing when these gripping tasks are performed
Monkey had to perform a light versus heavy precision grip. They had the same
extent of how much and how many neurons were firing
When monkey performed power grip, there was very little activity of the neurons
This suggest there are neurons in M1 that are specific to a specific action
Thalidomide and developmental dysmelia
Dysmelia = incomplete development of the limbs
-Hand and forearm is not completely developed
-Drug known as thalidomide for women who were experiencing morning
sickness that lead to this condition
-Provided neuroscientists with an important model for cortical organization
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