PSYCH 2NF3 Lecture Notes - Lecture 9: Periaqueductal Gray, Inferior Colliculus, Superior Colliculus
22 Feb 2018
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Lecture 9: organization of the nervous system ii. 1:1 glial to neuron ratio (used to think it was 10:1) Glia cells - administrative assistants to neurons allowing them to focus on their main task. Schwann cell forms insulating myelin in pns. Cerebellum - balance and used in formation of habits or grouping of behaviours with a motor components (e. g. driving car - red mean stop, apply break) Animals involved in more intricate movements will have a more developed cerebellum. Medulla - involved in regulating heart rate, breathing. Blow to back of the head can be fatal since respiration is affected. Reticular formation - involved in sleep cycle, helps us get to a point where we are conscious. Pons: takes in sensory information, relays it to the rest of the brain. Cerebral aqueduct (has csf), around it is the periaqueductal gray matter (gray = many cell bodies) Periaqueductal gray matter involved in pain perception and response to pain.
