CAS PS 222 Lecture Notes - Lecture 4: Reciprocal Inhibition, Membrane Potential, Axon Terminal
2 Aug 2018
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Refractory - time where another ap cant be generated: abs - no ap regardless of strength, rel - need strong stimulus to overcome hyperpolarization. Functional organization of human ns: sensory function - receive info (pns, integrative function - processing info (cns, motor function - acting on it, motor neurons carry to effector (muscle or gland), efferent goes from. Cns to effector, afferent from sensory to cns. Reflexes - occurs without conscious or brain: muscle stretch reflex - pateller tendon reflex (monosynaptic - 2 neurons, 1 synapse, sensory also synapses with inhibitory interneuron (quads contract, hamstrings retract) - one contract other relax = reciprocal inhibition. Large scale functional organization: somatic - conscious and deliberate, voluntary movement, autonomic - digestion, metabolism, circulation, perspiration, involuntary, efferent sympathetic (fight or flight - epinephrine) and parasympathetic (rest and digest) Anatomical organization of ns: cns - brain and spinal cord, pns - all other axons, dendrites, and cell bodies.
