Term
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Definition
- used for impulse conduction
- reflexes |
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How long is the typical adult spinal cord? |
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Definition
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official "end" of the spinal cord |
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Definition
a group of nerve roots inferior to the conus medullaris that resembles a horse's tail |
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Definition
intervates the upper limbs |
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Definition
innervates the lower limbs |
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Definition
runs from f. magnum to S2; not part of periosteum of bone; epidural space |
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Definition
forms strands that anchors conus medullaris to coccyx aka filum terminale |
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Definition
anterior median fissure and posterior median sulcus |
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Term
What does the external white matter consist of? |
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Definition
bundles of myelinated axons; anterior, posterior, lateral funiculi; tracts cross in medulla |
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Term
What does the inner gray matter consist of? |
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Definition
cellbodies, association neurons; H-shaped or butterfly (horns); gray commissure |
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2 Divisions of the Peripheral Nervous System (PNS) |
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Definition
Afferent Division and Efferent Division |
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Afferent division contains... |
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Definition
somatic sensory, visceral sensory, special senses |
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Efferent division contains... |
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Definition
somatic motor (voluntary); visceral motor/ autonomic (involuntary) |
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Term
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Definition
nerves, ganglia, and receptors outside CNS |
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Term
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Definition
bundles of axons, vessels, adipose; connective tissue coverings; cranial and spinal nevers, sensory and motor neurons |
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Definition
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Term
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Definition
1) Olfactory
2) Optic
3) Oculomtor
4) Trochlear
5) Trigeminal
6) Abducens
7) Facial
8) Vestibulocochlear
9)Glossopharyngeal
10) Vagus
11) Accessory
12) Hypoglossal |
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Term
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Definition
Sensory = detection of odors; anosia (loss of smell)
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Sensory = visual signals; optic chiasm; anopsia |
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Definition
point at which optic nerves converge |
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Definition
Motor = innervates upper eyelide msucle; supplies superior, inferior, medial rectus and inferior oblique eye musces; lens muschle; iris muscle |
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Definition
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Motor = controls the supeiror oblique eye muscle; downwards, lateral movment impaired |
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Definition
Sensory = sensations from face, nose, mouth
Motor = chewing muscles
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Term
3 divisions of the Trigeminal nerve |
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Definition
ophthalmic, maxillary and mandibular |
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Term
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Definition
Motor = innervates the lateral rectus eye muscle |
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Term
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Definition
inflammation; can cause intense pulsating pain that lasts from minutes to hours |
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Definition
double vision/ cross eyed |
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Definition
Sensory = Taste budds on anterior 2/3 tongue
Motor = innervates facial muscle, salivary glands, lacrimal (tear) glands |
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Definition
characterized by paralyzed facial muscles, eyelid droop, sagging corner of mouth |
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Definition
Sensory = auditory balance sensations; vesitublar lesion (dizziness); cochelar lesion (deafness); no foramen enter through the internal auditory canal |
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Definition
Sensory = posterior tate buds, somatic snesory from throat/ear
Motor = innervates swallowing muscle, parotid gland
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Definition
Sensory = sensations from viscera
Motor = smooth muscles of viscera; cardiac muscle; muscles of larynx and most pharynx muscles |
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Definition
Motor = innervates the trapezius, sterncleidomastoids; wouldnt be able to elevate shoulder or turn head to opposite side |
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Definition
Motor = innervates intrinsic and extrinsic tongue muscles |
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Number of spinal nerve pairs |
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Definition
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Structure of spinal nerve |
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Definition
arise form each cord segment; mixed nerves (sensory and motor) and two roots |
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Two roots of the spinal nerves |
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Definition
Ventral/ Anterior roots = motor neurons
Dorsal/Posterior Roots = sensory neurons |
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Definition
when the nerve splits once the spinal nerve leaves the intervertebral foramen |
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Definition
formed by nerves which are net work of anterior rami of spinal nerves |
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Definition
C1-C4; nerves run to head and neck |
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Definition
C5-T1; nerves run to shoulder and arms |
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L1-S4; nerves run to legs, genitals |
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Definition
sensations carried by spinal nerves |
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Term
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Definition
a phenomenon in wich pain or discomfort from one organ is mistakenly referred to a dermatome |
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Definition
provide rapid reacts to possibly threatening situations; only 2-3 neurons are involved; begins at PNS receptor and communicate w/ the CNS ; ends at a perpheral effector -muscle or gland |
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Term
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Definition
visceral and somatic reflexes |
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Term
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Definition
both the receptor and effector organs are on the same side |
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Term
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Definition
sensory impulses from a receptor cross over going though the spinal cord to activate effector organs in the opposite limb |
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Term
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Definition
simplest of all reflexes; sensory axons synapse directly on the motor neurons, whos axons projects to the effect; very small delay occurs in this reflex resulting in a very prompt reflex response |
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Term
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Definition
exhibit a number of synapses involving interneuron's within the relfex; more componenst result in a prolonged delay between stimulus and response |
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