Muscular system

Comprised of about 600 skeletal muscles

Myology

The study of muscles

Endomysium

Areolar connective tissue covering an individual muscle fiber

Fascicles

Bundle of muscle fibers

Perimysium

Connective tissue sheath surrounding an individual fascicle

Epimysium

Connective tissue layer surrounding an individual muscle

Deep fascia

Connective tissue sheet separating adjacent muscles

Superficial fascia

Connective tissue sheet separating muscle and skin

Direct (fleshy) attachment

Muscle attachment to bone in which collagen fibers of the epimysium are continuous with the periosteum

Indirect attachment

Muscle attachment in which the epimysium form a tendon that merges into the periosteum

Fusiform muscle

Muscle that is thick in the middle and tapered at each end

Parallel muscle

Muscle that has a uniform width

Convergent muscle

Muscle that is fanshaped

Pennate muscle

Muscle that is feather-shaped

Circular muscle

Muscle that forms a ring around a body opening

Prime mover (agonist)

Muscle that produces most of the force during a particular joint action

Synergist

Muscle that aids the prime mover

Antagonist

Muscle that opposes the prime mover

Fixator

Muscle that prevents a bone from moving

Intrinsic muscle

Muscle entirely contained within a particular region, having both its origin and insertion there

Extrinsic muscle

Muscle that acts upon a designated region but has its origin elsewhere

Innervation

Nerve supply to an organ

Rectus sheath

Fibrous sleeve enclosing the recuts abdominis

Linea alba

Bertical brivrous strip separating the rectus abdominis into right and left halves

Inguinal ligament

Aponeurosis that extends from the pubis to the anterior superior spine of the ilium

Perineum

Diamond shaped region between the thighs bordered by the pubic symphysis, coccys, and ishial tuberosities

Urogenital triangle

Anterior half of the perineum

Anal triangle

Posterior half of the perineum

Superficial perineal space

Layer of pelvic floor just deep to the skin

Urogenital diaphragm

Middle layer of pelvic floor

Pelvic diaphragm

Deepest layer of pelvic floor

Rotator cuff

Tendons of the infraspinatus, supraspinatus, subscapularis, and teres minor

Hernia

Condition in which the viscera protrude through a weak point in the muscular wall of the abdominopelvic cavity

Carpal tunnel syndrome

Condition characterized by inflamed, swollen, or fibrotic tissue in the wrist

Tongue

The only muscle in the body with an origin and no insertion