KP161 Lecture Notes - Lecture 4: Central Nervous System, Peripheral Nervous System, Brainstem
12 Feb 2018
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Document Summary
Signals are generated and sent to e ectors. Nerves that link the body to cns. Neurones at rest have a negative electrical charge (resting potential) If charge inside neuron exceeds -56 mv (threshold) Neurons that are excited have positive nerve impulses, or spikes (action potential) Neurons communicate through synaptic transmission (only understand electrical charges) Three functional areas: sensory, motor , association. Important in the initiation and control of subconscious gross body movements. Plays a key role in regulating the intensity of movement parameters. Degenerative conditions of basal ganglia lead to movement problems. If you do something wrong, it decides what to do next. Plays key role in detecting and correcting errors. Works with motor cortex to produce smooth, coordinated movements. Plays key role in maintaining posture and balance. Someone with cerebellum damage could reach for a cup, but would miss it. Ascending pathway: sensory info to cortex (info is sensory) and comes form dorsal pathway.
