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Kiara Smith
Human Anatomy
Term | Definition |
---|---|
transversus abdominis muscle | a muscle layer of the anterior and lateral (front and side) abdominal wall, deep to (layered below) the internal oblique muscle. It is thought by most fitness instructors to be a significant component of the core. |
Orbicularis Oris mastication | Responsible for chewing movements. These powerful muscles they elevate and retract the mandible (masseter and temporalis) or open and protrude it while causing sideways movement |
occipitofrontalis | Two muscles one portion lies over the forehead (frontal bone); the other covers the occipital bone in back of the head. The two muscular parts, or bellies, are joined by a connective tissue aponeurosis (the epicranial aponeurosis) that covers the top of |
Splenius | Rotates, extends neck and flexes neck laterally |
erector spinae muscle | group consists of a number of long, thin muscles that travel all the way down our backs. These muscles extend (straighten or pull back) the vertebral column and also flex the back laterally and rotate it a little. |
Spinalis group | Origin: Lower cervical or lower thoracic/ upper lumbar vertebral\ Function: Extends the neck or vertebral column |
external oblique | the muscle fascicles or fibers extend inferiorly and medially, whereas the fibers of the middle muscle layer |
urethral sphincter, | Con-striction of muscles which encircle the urethra in both sexes, helps control urine flow. |
Rectus abdominis | Same as external oblique; because abdominal muscles compress the abdominal cavity, they aid in straining, defecation, forced expiration, childbirth; abdominal muscles are antagonists of the diaphragm, relaxing as it contracts and vice versa Flexes trunk |
Linea alba | midline to form a tough band of connective tissue |