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NERV: PNS
Peripheral nervous system.
| Question | Answer |
|---|---|
| Central Nervous System (CNS) | brain and spinal cord |
| Peripheral Nervous System (PNS) | -cranial nerves and spinal nerves -communication lines between the CNS and the rest of the body |
| nerve | one or more bundles of neurons that connect the brain and the spinal cord with other parts of the body |
| neur/i, neur/o | nerve, nerve tissue |
| -esthesia | sensation, feeling |
| radicul/o | root or nerve root |
| -tropic | having an affinity for |
| ascending nerve tract | Carry sensory impulses from sensory organs toward the brain and spinal cord via afferent nerves. |
| descending nerve tract | Carry motor impulses away from the brain via efferent nerves. |
| ganglion | collection of nerve cell bodies in the peripheral nervous system |
| innervation | the supply of nerves to a specific body part |
| plexus | a network of intersecting spinal nerves |
| receptors | sites in the sensory organs that receive external stimulation |
| stimulus | anything that activates a nerve and causes an impulse |
| impulse | a wave of excitation transmitted through nerve fibers and neurons |
| reflex | an automatic, involuntary response to some change, either inside or outside the body (HR, RR, BP, cough, sneeze, response to pain, DTR) |
| neuron | a nerve cell; the basic building block of the nervous system |
| Connecting neurons | associative neurons which link sensory and motor neurons |
| somatic nerve fibers | Peripheral motor nerve fibers, convey information that control the body's voluntary muscular movement. |
| cranial nerves | 12 pairs of nerves arising from the brain |
| sympathetic nervous system | Division of autonomic nervous system, prepares the body for emergencies and stress by increasing the breathing rate, heart rate, and blood flow to muscles |
| parasympathetic nervous system | the division of the autonomic nervous system that calms the body, conserving its energy |
| spinal nerves | 31 pairs of nerves arising from the spinal cord |
| autonomic nerve fibers | Peripheral nerves that carry instructions to the organs and glands |
| Sensory nerve fibers | Peripheral nerves that receive external stimuli such as touch, heat, cold |
| cranial nerves identified as | roman numerals |
| peripheral nerves | A network of 31 pairs of nerves that branch out from the spinal cord and connect to the rest of the body and transmit signals to and from the brain through the spinal cord. |
| peripheral nerves identified by | numbers C1-C8, T1-T12, L1-L5, S1-S5 |
| Peripheral nerves named by | regions they innervate |
| cranial nerves named by | area or function |
| olfactory nerve | the cranial nerve that carries smell impulses from the nose to the brain |
| optic nerve | the cranial nerve that carries neural impulses from the eye to the brain |
| trigeminal nerve | Cranial nerve responsible for chewing and face sensations |
| facial nerve | Cranial nerve responsible for facial expressions and taste on anterior 2/3 of tongue |
| Vestibulocochlear nerve | Cranial nerve responsible for hearing and balance |
| vagus nerve | the cranial nerve that innervates digestive organs, heart and other areas |
| hypoglossal nerve | Cranial nerve responsible for tongue movement |
Created by:
jfoote
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