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28 Cards in this Set
- Front
- Back
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4 major functions of muscles:
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Movement
Sabillity Control of openings and passageways Heat production |
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Endomysium:
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Thin sleeve of loose connective tissue surrounding each muscle fiber
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Allows room for nerve fibers and capillaries to reach each muscle fiber
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Endomysium
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Perimysium
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thicker layer of connective tissue.
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Carry larger nerves and blood vessels, along with stretch receptors
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perimysium
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Epimysium
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Fibrous sheath surrounding entire muscle, outer surface grades into fascia
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sends projectinos between fascicles to form perimysium
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Epimysium
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Fascia:
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sheath of connective tissue that seperates neighboring muscle or muscle groups from each other, and sub-q tissue
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deep fascia is found...
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between adjacent muscles
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superficial fascia is found...
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between skin and muscle
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Shape: Fusiform:
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thick, tapered ends
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Parallel
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uniform width, parallel fascicles,
ex. abs |
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Triangular
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fan shaped, tapering at insertion point
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Pennate
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feather shaped
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Sphincter
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ring around body oppening
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Origin means:
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bony attachment to stationary end of muscle
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Belly:
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middle region between origin and insertion
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Insertion:
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Bony attachment to bony end of muscle
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Synergist:
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muscle that aids agonist, stabalizes joints
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Prime Mover (agonist)
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muscle that produces most force during action
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Antagonist:
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opposes the agonist
relaxes prime mover prevents injury and excessive movement |
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Antagonistic Pairs:
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muscles that act on opposite sides of the joint
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Fixator muscle:
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prevents movement of bone
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Intrinsic Muscles
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contained within the region, such as hand
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Extrinsic Muscles
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muscles move the finger, but found outside region
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innervation:
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refers to identity of the nerve that stimulates it
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Spinal nerves:
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arise from spinal cord, innervate muscles below neck
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Cranial Nerves:
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arise from base of brain, innervate head and neck muscles
-numbers l-Xll |
