Chapter 9 muscles

linea alba

A white line that extends from the sternum to the pubic bone; formed by the aponeurosis of the abdominal muscles

intercostal

Barbecued ribs

quadriceps femoris

Group of muscles that extend or straighten the leg at the knee, as in kicking a football

abdominal muscles

Includes the internal oblique, external oblique, transversus, and rectus

serratus anterior

Jagged muscle that resembles the teeth of a saw, lowers the shoulder and moves the arms - as in pushing a cart

pectoralis major

Large, broad muscle that forms the anterior chest wall; connects the humerus with the clavicle and structures of the chest

gluteus maximus

Largest muscle of body; you sit on it

tibialis anterior

Located over shin bone, causes dorsiflextion

Hamstrings

Muscle group on the posterior surface of the thigh that extends the thigh at the hip and flexes the leg at the knee; antagonist to the quadriceps femoris

bisceps brachii

Muscle that flexes the forearm; "make a muscle"

Deltoid

Muscle that forms the shoulder pads; position arm at "scare crow" position

triceps brachii

Muscle that lies along the posterior surface of the humerus; it extends the forearm and is used to bear weight in crutch - walking

Trapezius

Muscle that shrugs the shoulders and hyperextends the head

Adductors

Muscles located on the medial (inner) surface of the thigh; horseback riders use these muscles to grip the horse with their thighs

intercostal

Muscles responsible for raising rib cage during inhalation

Gastrocnemius

The Achilles' tendon attaches the soleus and this muscle to the heel bone

Gastrocnemius

The calf muscle that is used in plantar flexion; also called the toe dancers muscle

Diaphragm

The chief muscle of inhalation

Sloeus

With regard to plantar flexion; works synergistically with gastrocnemius

Diaphragm

a dome-shaped muscle that separates the thoracic cavity from the abdominopelvic cavity

Satorius

longest muscle in the body

quadriceps femoris

rectus femoris, vastus lateralis, vastus medialis, vastus intermedius

latissimus dorsi

the large, broad muscle in the middle and lower back that extends and adducts the humerus and rotates the humerus medially