ANAT30007 Lecture Notes - Lecture 2: Extrapyramidal System, Cranial Nerves, Coccyx

• School: University of Melbourne
• Department: Anatomy and Neuroscience
• Course: ANAT30007
• Professor: Varsha Pilbrow

Document Summary

Lecture 2 nervous system 1: peripheral nervous system. Major movement types and organisation of basic movements: simple pattern reflexes: involve spinal cord circuits only, are automated, unlearned, & stereotyped (predictable) reflexes; do not require cortical input, complex postural (reflex movements) adjustments: Note: upper motor neurons always remain within the. Don"t depart to the pns: cell bodies of lower motor neurons are located in the cns but their axons project out into the pns to target the skeletal muscles that they innervate. Motor unit: one motor neuron innervates a group of muscle fibres (the group is called a motor unit, muscles for precise contraction have small motor units (e. g. external eye muscles) In power-generating muscles, which do not necessarily need precise contraction, have large motor units (e. g. quadriceps muscles) Neuromuscular junction (nmj) = synapse or junction between axon terminal of a motor neuron and muscle fibres.