Psychology 1000 Lecture Notes - Lecture 15: Motor Neuron, Hindbrain, Cranial Nerves

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Dr.Mike

Document Summary

Cns = brain and spinal cord: brain includes cerebrum, cerebral hemispheres, brainstem (midbrain, pons, and medulla), and cerebellum, forebrain, midbrain, hindbrain. Forebrain becomes cerebrum, midbrain becomes midbrain, and hindbrain becomes pons/medulla/cerebellum. Cranial (12 pairs) + spinal nerves (31 pairs: nerves, ganglia. Basic = motor (control of skeletal muscle), sensory (the senses), automatic (reflexes) Higher = cognition (thinking), emotions (feelings), and consciousness. Lower motor neurons efferent neurons of the pns, control skeletal muscle. Skeletal muscle cells it contacts is the other end of the motor unit. Abnormalities can occur in the motor unit weakness. Fine touch travels in fast neurons, less precise info travels in slower ones. Mechanoreceptors, one type close to skin, another type lower. Also some in deep tissue, deep in muscle that detects stretch. One sin muscle important for position, while ones in skin are imp for vibration/touch: pain and temperature receptors end in uncovered terminals, don"t have big structures like mechanoreceptors.