Kinesiology 3480 Lecture Notes - Lecture 10: List Of Fullmetal Alchemist Characters, Neurosurgery, Cerebral Cortex

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 3480
• Professor: Heath

Document Summary

Neuron has moved laterally because it is on the hand representation on the primary motor cortex. Neuron sends axon to the brain stem and at the level of the pyramid in the brain stem, 80% of the fibres cross over to the other side. Important feature is that it makes monosynaptic connections with alpha motor neurons, those alpha motor neurons innervate distal muscles in particular distal muscles of the hand. As indicated, direct monosynaptic connections allow for fractionated digit movement you can move your thumb independent of your pinky or independent of your index finger. The lateral corticospinal tract has monosynaptic connections that innervate muscles of the hand, without fractionated control we would only be able to perform power grips and not precision grips. Important difference between ventral and lateral corticospinal tracts: lateral corticospinal tract connects (i. e. , synapses) with a motorneuron, ventral corticospinal tract connects to propriospinal neurons, which ultimately synapse with motorneurons. Propriospinal neurons allow coordination between multiple motorneurons.