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Nervous System

Nervous system study guide

synapse the location where one neuron transfers the impulse to another
cell body The cell body, also called the soma, is the spherical part of the neuron that contains the nucleus. The cell body connects to the dendrites, which bring information to the neuron, and the axon, which sends information to other neurons.
axon the long threadlike part of a nerve cell along which impulses are conducted from the cell body to other cells.
dendrite a short branched extension of a nerve cell, along which impulses received from other cells at synapses are transmitted to the cell body. a crystal or crystalline mass with a branching, treelike structure.
cerebrum controls thought
cerebellum controls the ability to balance
medulla controls autonomic function
spinal cord sends info to the brain
spinal nerves receives the info ans sends it out if it needs to
central nervous system the brain and the spinal cord, make up one of the two main parts of the nervous system
peripheral nervous system Consists of sensory nerves and motor nerves, make up the second of the two main parts of the nervous system
sympathetic nervous system the "up" system: dilates pupils, accelerates heart, dilates bronchi...
parasympathetic nervous system the "down" system: constricts pupils, stimulates tear glands, slows heart, constricts bronchi...
the cerebral cortex your thinking brain, convoluted (folded) to have more space the large the cortex the smarter the species
the limbic system "middle" section of the brain, emotional regulation & reaction "your emotional brain"
interneurons interconnect various neurons within the brain or the spinal cord
motor neurons conduct motor commands from the cortex to the spinal cord or from the spinal cord to the muscles
sensory neurons receive sensory signals from sensory organs and send them via short axons to the central nervous system
frontal lobe motor control; concentration, planning and problem solving; speech; smell
parietal lobe touch and pressure; taste; body awareness
occipital lobe vision
temporal lobe hearing; facial recognition
primary motor cortex (on the frontal lobe) controls voluntary movement
primary auditory cortex (on the temporal lobe) process auditory info
somatosensory cortex (on parietal lobe) receives info on body sensations
primary visual cortex (ob the occipital lobe) processes visual info
association areas (on all four lobes) combine sensory and motor info coordinate between different brain areas
Created by: lilmesha77



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