Kinesiology 3222A/B Lecture Notes - Lecture 1: Axon, Anterior Cerebral Artery, Eyelid
7 Dec 2015
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* brainstem begins where brain meets spinal cord at the foramen magnum. *approximately 100 billion neurons in the body, which do not regenerate. Specialized for carrying electrical signals (impulses, action potentials) Do not participate directly in synaptic interactions or information processing. Primary target for synaptic input from other neurons. Can be thousands of dendrites on specialized neurons. Connector of cell body (soma) and axon (departure point of axon) Target of anterograde transport (cell body to terminal) Originator of retrograde transport (terminal to cell body) Pre-synaptic terminal (contains synaptic vesicles that release neurotransmitters) Synaptic cleft (gap between neurons that neurotransmitters are released into by axon of first cell and picked up by dendrites of next cell) Post-synaptic specialization (where neurotransmitters bind to cell) Contribute to blood-brain barrier (prevent molecules in vasculature from entering brain) Myelinating glia coil around several axons (can myelinate several axons) Myelinating glia associated with one nerve only (can myelinate one axon only)
