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34 Cards in this Set
- Front
- Back
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The fascicles are parallel to the long axis of the muscle. They are generally long strap like muscles that can generate much force. The strongest of these muscles are sudiform in shape, that is, they are wide in the middle and taper at each end.
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Parallel--Rectus abdominus and biceps brachii
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These are fan-like muscles. The fascicles are broad at the origin and taper to a narrow insertion. THis arrangement functions to concentrate the force of the muscle contraction into a smaill area.
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Convergent--Pectoralis major
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The fascicles are attached to a tendon in a feather like manner. THe tendon is the shaft of the feather and the fascicles are the vane of the feather. There are 3 types of pennate muscles. In a unipennate muscle the fascicles are attached to one side of the tendon. In a bipennate muscle the fascilcles are attached to one side of teh tendon. Ina bipennate muscle the fascicles are attached to both sides tot he tendon. In a multipennate muscle the fascicles converge on a branching tendon.
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Pannate--Extensor digitorum, rectus femoris, and the deltoid, respectively
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These are sphincter muscles. The fascicles surrond an opening. the action of the muscle increases or decreases the diameter of the opening
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Circular--Orbicularis oculi
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Frontalis- Function
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Lifts the Eyebrows.
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Occipitalis- Function
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Pulls teh skin posteriorly.
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Sternocleidomastoid- Function
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Extend and turn the head.
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Temporalis- Function
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Acts with the masseter to raise and pull back the mandible.
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Orbicularis Oris- Function
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Closes and protrudes the lips, pulls the lips back against the teeth
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Levator Scapulae- Function
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Elevates and draws the scapula meially, extends and/or flexes the head
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Splenius Capitis- Function
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Extend the head when contracting together and rotate the head with contracting singly
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Rhomboideus minor- Function
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Elevates and helps the scapular rotate when adducting the arm.
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Frontalis- Location
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Top forehead; skull; Right
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Occipitalis- Location
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Top forehead; skull; Left
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Sternocleidomastoid- Location
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Neck; Long; Side
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Temporalis- Location
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Temple
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Masseter- Location
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Bottom Jaw Bone
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Orbicularis Oris- Location
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Upper Lip
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Levator Scapulae- Location
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Back/Side Neck
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Splenius Capitis- Location
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Back Neck
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Rhomboideus Minor- Location
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Slanted back neck, thin
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Pectoralis Minor- Function
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Depresses and abducts the scapula, rotates it down and can stabilize the scapula
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Pectoralis Major- Function
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Adducts, flexes and medially rotates the humerus inward
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Serratus Anterior
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Abducts the scapula and rotates it upward, lifts the ribs when the scapula is fixed
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Internal Oblique- Function
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It compresses the abdomen and can rotate the vertebral column
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External Oblique- Function
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It compresses the abdomen and can rotate the vertebral column
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Rectus Abdominis- Function
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Flexes the lumbar region of the vertebral column and compresses the abdomen
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Trapezius- Function
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Elevates and/or adducts the scpula, rotates the scapula up or down, draws the head back when the shoulders are fixed
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Rhomboideus Major- Function
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Elevates and rotates the scapula downward while adducting the arm
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Infraspinatus-Function
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It laterally rotates and abducts the arm at the shoulder
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Teres Minor-Function
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laterally rotates, extends, and adducts teh humerus at the shoulder and stabilizes the elbow joint
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Teres Major-Function
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Assist the extension of the humerus, medially rotates teh humerus, helps rotate the scapula downward
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Latissimus Dorsi-Function
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Extends adducts and medially rotates the arm at the soulder. I also draws the arm inferiorly and posteriorly
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Lumbodorsal Fascia- Function
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A connective tissus that acts as the origin for muscles of the lower back
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