Ch 6 Head, Neck and Trunk
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Created by:
eagleswings59 Plus on November 15, 2011
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marieb
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20 terms
Terms | Definitions |
|---|---|
 frontalis | forehead muscle (Raises eyebrow andfacial expressions) |
| occipitalis | o: occiptal bone; i: scalp; pulls scalp posteriorly |
| orbicularis oculi | Closes eyelids; used in blinking, winking, and squinting |
| buccinator | compresses cheeks |
| zygomasticus | Elevates corners of mouth |
| masseter | a large muscle that raises the lower jaw and is used in chewing |
| temporalis | Elevates and retracts mandible; assists in side to side movement of mandible |
| platysma | sheet-like muscle in neck that pulls mouth (jaw) downward |
| sternocleidomastoid | one of two thick muscles running from the sternum and clavicle to the mastoid and occipital bone |
| pectoralis major | a skeletal muscle that adducts and rotates the arm |
| intercostal muscles | Muscles which move the rib cage during breathing |
| rectus abdominus | major spine flexor, forms 6 pack and translates to "straight muscle of abdomen" |
| external obliques | flexs vertebrae column; compresses abdomen ; rotates vertebrea column |
| internal obliques | Origin: Iliac Crest. Insertion: Linea Alba and Bottom of Costals. Action: Flexion and Rotation to Same Side. |
| transversus abdominis | a flat muscle with transverse fibers that forms the anterior and lateral walls of the abdominal cavity |
| rectus abdominis | straight (rectus) abdominal muscle |
| trapezius | either of two flat triangular muscles of the shoulder and upper back that are involved in moving the shoulders and arms |
| latissimus dorsi | Extends, adducts, and medially rotates the arm; draws the shoulder downward and backward |
| erector spinae | Major muscle group of the vertebral column. Consists of Iliocostalis, Longissimus, and Spinalis muscles. Laterally flex spine & extend vertebral column. |
| deltoid | a large triangular muscle covering the shoulder joint and serving to abduct and flex and extend and rotate the arm |
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