PSYC 2307 Lecture Notes - Lecture 2: Grey Matter, Action Potential, Neuroanatomy
23 Jun 2020
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Document Summary
Grey" matter nervous tissue that appears greyish due to the presence of unmyelinated neuronal cell bodies and axons. White" matter nervous tissue that appears light coloured due to the presence of myelinated axons. Neuronal tracts are typically white matter: layers or nuclei: gross anatomy: a well-defined group of neuron cell bodies (i. e. , the bodies of many neurons as distinct from the nucleus of a single neuron) Inhibitory post synaptic potentials (ipsps) created in the receiving neuron"s dendrites decrease the likelihood of the production of an action potential on its axon. They regulate the transmission of electrical impulses within the brain: microglia: account for 10 15% of all cells found within the brain. Irrigate the superior surface of the cortex: middle cerebral artery. Lateral surface of the cortex: posterior cerebral artery, communicate through the circle of willace. Rapid deceleration of the head can lacerate or contuse brain structures particularly those near the bony surface of the skull.
