Bio 137 : Chapter 10 pt. 1
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29 Terms
Endomysium
Tissue around each muscle fiber
Inner individual muscle layer
Perimysium
Fascicles
Group of muscle fibers
Epimysium
Entire muscle
Fusiform
Biceps brachii
Bicep brachii location
Proximal upper extremity
Triangular
Pectoralis major
Pectoralis major location
Chest muscle
Multipennate
Deltoid
Deltoid location
Shoulder region
Circular
Orbicularis oculi
Orbicularis oculi location
Circular muscle surrounding eye
Prime mover and example
Produces most of the force
Brachialis
Synergist and example
Aids the prime mover
Biceps brachii
Antagonist and example
Opposes the prime mover
Triceps brachii
Depressor labii inferioris
Lowers bottom lip
Occipitofrontalis
Frontal :
Draws scalp forward
Occipitofrontalis
Occipital :
Retracts scalp
Orbicularis oculi
Closes the eye
Orbicularis oris
Closes mouth
Buccinator
Compresses cheek
Fibers
E - W
Platysma
Superficial neck muscle
Anteriorly
Muscles of mastication
Temporalis
Masseter
Pterygoid muscles
Pterygoid muscles
Medial
Lateral
Lateral grinding
TMJ
Where are the pterygoid glands located
Sphenoid bone
Digastric
2 bellies
Antagonists to the muscles of mastication
Sternocleidomastoid
Spasm - torticollis
Neck flexion
Contralateral rotation
Scalenes
3 muscles on each side of neck
Anterior
Spasm of the scalenes
Thoracic outlet syndrome
Arm and hand numbness
Note 
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