CSE 528 Lecture Notes - Lecture 6: Central Nervous System, Somatic Nervous System, Reflex Arc
26 Apr 2013
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Two components: somatic: nerves connecting to voluntary skeletal muscles and sensory receptors. Example of somatic: ify ou"re going to shake a friend"s hand, you must use your somatic nervous system to send commands from your brain and spinal cord to your hand and arm. You then get some feedback going towards your brain to tell you what you feel. This uses two different kinds of nerve fibres: Afferent nerve fibers (incoming): axons that carry info away from the periphery to the cns: this carries sensory info back to your brain from your hand. Efferent nerve fibers (outgoing): axons that carry info from the. Cns outward to the periphery: this carries info from your brain to your hand, autonomic: nerves that connect to the heart, blood vessels, smooth muscles, and glands. Largely operates under the level of consciousness. Regulates heart rate, respiration, fight or flight responses, etc. Spinal cord: local feedback loops control reflexes ( reflex arcs )
