Kinesiology 1080A/B Lecture Notes - Lecture 4: Dorsal Root Ganglion, Alpha Motor Neuron, Posterior Column

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 1080A/B
• Professor: Matthew Heath

Document Summary

E erent neurons descend in the dorsal column via the front of the spinal column via the ventral root ganglion (depicted in blue: ventral root gangion contains axons associated with alpha and gamma neurons. Depicted here is an alpha motor neuron. We know this because of the relationship between an alpha motor neuron and incoming sensory information. 1a a erent means sensory information from an intrafusal muscle bre about stretch. This has a monosynaptic synapse with the cell body of an alpha motor neuron: intrafusalmuscle bres monosynapticly connects directly to the cell body with something that connects with muscle. Phrenology is a pseudoscience that believed that distinct regions of the brain were responsible for emotions as depicted. Modern neuroscience depicts that di erent regions of the brain are responsible for di erent sensory, motor, and behavioural functions: they"re still in a way connected, it"s all about pinpointing structure vs. function.