Ch 4 the Muscular System. Overview Muscles: my/o, myos/o> Make body movement possible, hold body...
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Transcript of Ch 4 the Muscular System. Overview Muscles: my/o, myos/o> Make body movement possible, hold body...
Ch 4 the Muscular System
Overview
Muscles: my/o, myos/o> Make body movement possible, hold body erect, move body fluids, and produce body heat.
Fascia: fasci/o> Cover, support, and separate muscles.
Tendons: ten/o, tend/o, tendin/o> Attach muscle to bone
Types of muscle Tissue Skeletal Muscles: Attach to bones of the skeleton and are the
muscles that make possible body motions.
Smooth Muscle: Located in internal organs>stomach, intestines, blood vessels. Their function is to move fluids.
Cardiac Muscle: Forms the muscular wall of the heart.
Type I Muscle Fibers- slow twitch: Endurance
Type II Muscle Fibers-fast twich: Power
Muscle Motions Abduction: moves away from
the midline
Flexion: (bending) decreases an angle as in bending a joint
Elevation: raises a body part
Rotation: Turns a bone on its own axis
Supination: turn the palm upward or forward
Dorsiflexion: bends the foot upward at the ankle
Adduction: moves toward the midline
Extension: (straightening) increases an angle as in sraightening a joint
Depression: lowers a body part
Circumduction: rotate in a circle
Pronation: turn the palm downward
Plantar flexion: bends the foot downward at the ankle
Ch 4 Terms
fasci/o fascia, fibrous band
kinesi/o movement
my/o muscle
tax/o coordination, order
ten/o, tend/o, tendin/o tendon, stretch out, extend, strain
rrhexis- rupture
hemi half
-plegia paralysis, stroke
sub- below
tri three
Words Fascitits> inflammation of a fascia (tissue)
Kinesiology> is the study of muscular activity and the resulting movement of body parts
Myectomy> surgical removal of a portion of a muscle
Dystaxia> difficulty in controlling voluntary movement
Tendonitis> inflammation of the tendon caused by excessive or unusual use of the joint
Myorrhexis> rupture of a muscle
Quadriplegia> paralysis of all four extremities
Hemiparesis> slight paralysis of one side of the body
Subscapularis> muscle in the front of the scapula
Triceps> back of the upper arm with three divisions: long, medial, and lateral heads