PSYCH261 Lecture Notes - Lecture 7: Globus Pallidus, Inferior Parietal Lobule, Vestibular Nuclei

• School: University of Waterloo
• Department: Psychology
• Course: PSYCH261
• Professor: Karly Neath

Document Summary

Extrafusal muscle fibre: one of the muscle fibers that are responsible for the force exerted by contraction of a skeletal muscle. Alpha motor neuron: a neuron whose axon forms synapses with extrafusal muscle fibres of a skeletal muscle; activation contracts the muscle fibres. Intrafusal muscle fibre: a muscle fibre that functions as a stretch receptor, arranged parallel to the extrafusal muscle fibres, thus detecting changes in muscle length. Gamma motor neuron: a neuron whose axons form synapses with intrafusal muscle fibres. Motor unit: a motor neuron and its associated muscle fibres. Myofibril: an element of muscle fibre that consists of overlapping strands of actin and myosin; responsible for muscular contractions. Actin: one of the proteins (with myosin) that provide the physical basis for muscular contraction. Myosin: one of the proteins (with actin) that provide the physical basis for muscular contraction. Striated muscle: skeletal muscle; muscle that contains striations.