Back, Neck, Trunk and Head Muscles
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Frontalis (head) | Action: Draws scalp anteriorly, located n top of forehead
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| Occipitalis (head) | Action: Draws scalp posteriorly, located at back of head
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| Temporalis (head) | Action Elevation of mandible
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| Masseter (head) | Action: Elevation of mandible
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| Orbicularis Oris (head) | Action: Closes the mouth and protacts lips. Think whistle
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| Orbicularis Oculi (head) | Action: Closes and squints the eyelids
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| Platysma (neck) | Action: Draws up the skin of superior neck and chest. Think dickie. Movement is up and down. Most superficial of neck muscles
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| Sternocleidomastoid (neck) | Also known as SCM. Bilateral action is flexion of the neck. Unilateral action is lateral flexion and contralateral rotation of neck
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| Bilateral | Action when both paired muscles work in unison
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| Unilateral | When only on of a pair of muscles is used
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| Scalenes (Anterior, Middle and Posterior) (neck) | Action: Bilaterally flexion of the neck. Unilateral action is lateral flexion of the neck
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| Pectoralis Major (chest) | Action: Adduction and medial rotation of arm
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| Pectoralis Minor (chest) | Action: Protraction and depression of scapula
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| Serratus Anterior (chest) | Action: Protraction of scapula
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| Rectus Abdominus (abdomen) | Action: Flexion of trunk. Think 6 pack.
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| External Obliques (abdomen) | Action: Bilatterally is flexion of the trunk. Unilatterally action is lateral flexion of the trunk and contralateral rotation of trunk
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| Contralateral | Muscle action to opposite side of the body
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| Ipsilateral | Action to same side of body. Hint, only happens with 3 muscles
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| Internal Obliques (abdomen) | Action: Bilaterally is flexion of trunk. Unilateral action is lateral flexion and ipsilateral rotation of trunk
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| Transverse Abdominus (abdomen) | Action: compression of abdominal contents Produces no movement.
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| Trapezius (middle and lower)(back) | Layer 1 of back
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| Latissimus Dorsi (back) | Layer 1 of back
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| Rhomboids (back) (major and minor) | Layer 2 of back
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| Erector Spinae (includes Spinalis Longissimus and Iliocostalis) (back) | Layer 4 of back
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| Trapezius (upper) (posterior neck) | Layer 1 of neck
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| Levator Scapulea (neck) | Layer 3 of neck
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| Erector Spinae (longissimus and Iliocostalis) (neck) | Layer 3 of neck
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| Spinalis (neck) | Layer 3 of neck
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| Quadratus Lumborum (back) | Layer 4 of back
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| 1 | 3
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Created by:
dlt0951
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