PSY 2012 Lecture Notes - Lecture 2: Latrodectus, Peripheral Nervous System, Central Nervous System
Document Summary
Neuron: basic building block of the nervous system. Consists of a cell body, dendrites, axons, & presynaptic/axon terminals. Myelin sheath: layer of fatty tissue that insulates some axons to speed impulses. Sympathetic- fight or flight (think your body has sympathy for you so it helps you) Communicates with the body by means of sensory & motor neurons. Sensory: carry information about pain, touch, etc. from the body to the brain. Motor: transmit impulses from cns to muscles & glands. Interneurons: lie in between sensory & motor neurons & aid in information processing. Reflex: a simple, automatic, inborn response to a sensory stimulus. Brainstem: central core of the brain: medulla: controls heartbeat & breathing, reticular formation: involved in controlling arousal. Cerebellum: little brain; coordination of voluntary movement & balance. The limbic system: associated with emotions & drives. Hypothalamus: maintenance & governs the endocrine system via the pituitary gland. Left: controls right side of the body; language.
