Lab 12 - Spinal cord, PNS & special senses

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72 Terms

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cervical enlargement (1)

in cervical region

<p>in cervical region</p>
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Lumbar enlargement (2)

in lumbar region

<p>in lumbar region</p>
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conus medullaris (3)

cone shaped end of spinal cord between L1 & L2

<p>cone shaped end of spinal cord between L1 &amp; L2</p>
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Cauda equina (4)

bottom of spine

<p>bottom of spine</p>
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Central canal

In the middle of spinal cord

<p>In the middle of spinal cord</p>
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White matter

contains myelinated axons; relays messages

<p>contains myelinated axons; relays messages</p>
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grey matter

contains cell bodies

<p>contains cell bodies</p>
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dorsal (posterior) horns

contains cell bodies of sensory neurons

<p>contains cell bodies of sensory neurons</p>
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Ventral ( anterior ) horns

contains cell bodies of somatic motor neurons

<p>contains cell bodies of somatic motor neurons</p>
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Lateral horns

contians cell bodies of visceral motor( autonomic) neurons

<p>contians cell bodies of visceral motor( autonomic) neurons</p>
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spinal nerve

begins at junction of a dorsal and a ventral root

<p>begins at junction of a dorsal and a ventral root</p>
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dorsal( posterior) root of spinal nerve

Contains sensory neuron axons.

<p>Contains sensory neuron axons.</p>
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dorsal ( posterior) root ganglion

Enlarged area connects to dorsal root; sensory

<p>Enlarged area connects to dorsal root; sensory</p>
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Ventral ( anterior) root of spinal nerve

continas motor neuron axons

<p>continas motor neuron axons</p>
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epidural spcae

space between intervertebral foramen and dura mater, contains fat

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dura mater

Outermost layer of the meninges

<p>Outermost layer of the meninges</p>
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subdural space

space between dura mater and arachnoid mater

<p>space between dura mater and arachnoid mater</p>
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arachnoid mater

middle meningeal layer

<p>middle meningeal layer</p>
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subarachnoid space

Space between arachnoid and pia mater, contains CSF.

<p>Space between arachnoid and pia mater, contains CSF.</p>
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Pia mater

Innermost layer of the meninges

<p>Innermost layer of the meninges</p>
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Cervical Nerves

C1-C8

<p>C1-C8</p>
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Thoracic nerves

T1-T12

<p>T1-T12</p>
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Lumbar Nerves

L1-L5

<p>L1-L5</p>
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scaral nerves

S1-S5

<p>S1-S5</p>
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coccygal nerve

CO1

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cervical plexus

C1-C5

<p>C1-C5</p>
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brachial plexus

C5-T1

<p>C5-T1</p>
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lumbar plexus

L1-L4

<p>L1-L4</p>
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sccral plexus

L4-S4

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phernic nerve

Motor: diaphragm

<p>Motor: diaphragm</p>
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Axillary nerve

motor: shoulder

sensory: shoulder

<p>motor: shoulder</p><p>sensory: shoulder</p>
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musculocutaneous nerve

motor: anterior arm

sensory: lateral forearm

<p>motor: anterior arm</p><p>sensory: lateral forearm</p>
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Median nerve

motor: anterior forearm and hand

sensory: lateral hand

<p>motor: anterior forearm and hand</p><p>sensory: lateral hand</p>
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Ulnar Nerve

motor: anterior forearm and hand

sensory: medial hand

<p>motor: anterior forearm and hand</p><p>sensory: medial hand</p>
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Radial nerve

Motor: posterior arm and forearm

sensory: posterior arm, forearm hand

<p>Motor: posterior arm and forearm</p><p>sensory: posterior arm, forearm hand</p>
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sclera

white of the eye

<p>white of the eye</p>
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cornea

transparent layer, bulges: refracts light

<p>transparent layer, bulges: refracts light</p>
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Choroid

dark membrane with blood vessels; nourishes eye, absorbs excess light

<p>dark membrane with blood vessels; nourishes eye, absorbs excess light</p>
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ciliary body

Contains ciliary muscle and process

<p>Contains ciliary muscle and process</p>
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suspensory ligament

attaches lens to the ciliary process

<p>attaches lens to the ciliary process</p>
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iris

pigmented; contians muscles that control the amount of light entering the eye by changing pupil diameter

<p>pigmented; contians muscles that control the amount of light entering the eye by changing pupil diameter</p>
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pupil

opening of iris; allows light to enter eye

<p>opening of iris; allows light to enter eye</p>
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retina

contains photoreceptors

<p>contains photoreceptors</p>
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rods

respond to low light, night vision

<p>respond to low light, night vision</p>
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cones

function best in bright light, perceive colors

<p>function best in bright light, perceive colors</p>
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macula lutea

area of high photorecptor density

<p>area of high photorecptor density</p>
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fovea centrails

center of macula lutea; produces highest visual acuity

<p>center of macula lutea; produces highest visual acuity</p>
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optic disc

region with no photoreceptors

<p>region with no photoreceptors</p>
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arteriole/venule

blood supplying oxygen and nutrients to eye

<p>blood supplying oxygen and nutrients to eye</p>
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lens

Focuses light onto retina

<p>Focuses light onto retina</p>
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optic nerve

carries input form eye to brain

<p>carries input form eye to brain</p>
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anterior cavity

cavity anterior lens

<p>cavity anterior lens</p>
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posterior cavity

cavity posterior to lens

<p>cavity posterior to lens</p>
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aqueous humor

fluid in the eye, found between the cornea and the lens

<p>fluid in the eye, found between the cornea and the lens</p>
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vitreous body

a transparent jellylike substance filling the interior of the eyeball

<p>a transparent jellylike substance filling the interior of the eyeball</p>
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lacrimal gland with ducts

Secretes lacrimal fluid containing mucus, antibodies, and lysozyme

<p>Secretes lacrimal fluid containing mucus, antibodies, and lysozyme</p>
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auricle

external ear

<p>external ear</p>
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external auditory canal

knowt flashcard image
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tympanic membrane

vibrates at same frequency as sound waves; transmit vibrations to ossicles

<p>vibrates at same frequency as sound waves; transmit vibrations to ossicles</p>
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malleus

knowt flashcard image
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inucs

knowt flashcard image
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stapes

knowt flashcard image
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pharyngotympanic tune

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cochlea

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spiral organ

Contains hair cells for sound detection.

<p>Contains hair cells for sound detection.</p>
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tectorial membrane

hair cells push tectorial membrane, bending hair cells

<p>hair cells push tectorial membrane, bending hair cells</p>
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hair cells

basilar membrane pushes on hair cells; when bent, create action potentials in cochlear nerve

<p>basilar membrane pushes on hair cells; when bent, create action potentials in cochlear nerve</p>
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basialar membrane

fluid of cochlea

<p>fluid of cochlea</p>
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cochlear nerve

carries auditory information to the brain

<p>carries auditory information to the brain</p>
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Semircular canals

equilibrium/balance - rotational acceleration of head

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vestibule

equilibrium/balance- linear acceleration of head

<p>equilibrium/balance- linear acceleration of head</p>
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vestibulocochlear nerve

hearing and balance

<p>hearing and balance</p>