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Peripheral Nervous system
Anatomy and physiology 430
Terms in this set (28)
arising outside the body so most exteroreceptors are near or at the body surface, they include touch, pressure, pain and temperature receptors in the skin and most receptors of the special senses.
respond to stimuli within the body, such as from the internal viscera and blood vessels . they monitor a variety of stimuli, including chemical changes, tissue stretch and temperature
respond to internal stimuli. proprioceptors occur in skeletal muscles tendons, joints, and ligaments and in connective tissue covering of bone and muscles. the constantly advice the brain of our body movements by monitoring how much the organs containing these receptors are stretched.
vision , hearing , equilibrium, smell and taste
found throughout the perimysium of a skeletal muscle they detect muscle stretch and initiate a reflex that resist the stretch.
Golgi tendon organ
proprioceptors located in tendons, close to the skeletal muscle insertion. when Golgi tendon organs are activated, the contracting muscles is inhibited which causes it to relax.
joint kinesthetic receptors
monitors stretch in the articular capsules that enclose synovial joints.At least four receptor types together these receptor s provide information on joint position and monitor a sensation of which we are highly conscious.
olfactory nerves (I)
theses are the tiny sensory nerves of smell, which run from the nasal mucosa to synapse with the olfactory bulbs.
optic nerves (II)
this sensory nerve of vision develops as an outgrowth of the brain
Occulomotor nerves (III)
"eye mover" this nerve supplies four of the six extrinsic muscles that move the eyeball in the orbit.
trochlear nerves (IV)
"pulley" an extrinsic eye muscle that loops through a pulley shaped ligament in the orbit.
trigeminal nerves (V)
it supplies sensory fibers tot he face and motor fibers to the chewing muscles
abducens nerves (VI)
controls the extrinsic eye muscle that abducts the eyeball 0turns it lateral)
facial nerves (VII)
a large nerve that innervates muscle of facial expression
vestibulocochlear nerves (VIII)
sensory nerve for hearing and balance was formally called the auditory nerve
glossopharyngeal nerves (IX)
"tongue and pharynx" and reveals the structure that this nerve helps to innervate.
vagus nerves (X)
"wanderer" is the only cranial nerve to extend beyond the head and neck to the thorax and abdomen.
accessory nerves (XI)
considered and accessory part of the vagus nerves.
hypoglossal nerves (XII)
means under the tongue, this nerves runs inferior to the tongue and innervates the tongue muscles.
caused by inflammation of trigeminal nerve is widely considered to produce most excruciating pain known; as stabbing pain, it last for a few seconds to a minute.
paralysis if facial muscles on affected side and partial loss of taste sensation, lower eyelid droops , corner of mouth sags, tear drip continuously from eye and eye cannot be completely closed.
characterized by stabbing pain radiating over the course of sciatic nerve, is common.
any nerve serving a muscle that produces movement at a joint also innervates the joint and the skin over the joint
area of skin innervated by the cutaneous branches of a single spinal nerve
automatic reaction to stimuli
reduced ability to feel pain, not accompanied by loss of consciousness, an analgesic is a pain relieving drug.
sharp spasm like pain along the course of one or more nerves, may be caused by inflammation or injury of nerves
a viral infection of sensory neurons serving the skin. characterized by scaly, painful blisters usually confined to a narrow strip of skin , often on one side of the body trunk.