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Muscle A&M

anatomy

QuestionAnswer
frontalis raises the eye brows
orbicularis oculi blinks and closes eyes
orbicularis oris closes and protrudes lips
temporalis closes jaw
masseter closes jaw
zygomaticus raises corner of mouth
occipitalis
buccinator compresses cheek as in whistling and sucking; holds food between teeth during chewing
pectoralis major adducts and flexes humerus
trapezius extends neck and adducts scapula
latissimus dorsi extends and adducts humerus
biceps brachii flexes elbow and supinates forearm
gluteus maximus extends hips
iliopsoas (iliacus and psoas major) flexes hip
sartorius flexes thigh on hip
tibialis anterior dorsiflexes and inverts foot
gastrochemius planter flexes foot and flexes knee
sternocleidomastoid flexes neck; rotates head
platysma pulls corners of mouth interiorly
deltoid abducts arm
erector spinae (deep) extends back
triceps brachii extends elbow
gluteus medius abducts thigh; steadies pelvis during walking
adductor group adduct thigh
gracilis
fibularis longus
soleus plantar flexes foot
quadriceps group rectus femoris (flexes hip to thigh), vastus medialis, vastus latenalis, vastus intormedius (all. extend knee)
hamstring group biceps femoris, semitendincsus, and semimembranosus all flex knee and extend hp
abdominal muscles rectus abdominis, external oblique, and internal oblique (all flex vertebral column) external oblique and internal oblique (rotate vertebral column) transversus abdominis (compresses abdomin)
flexion decreases the angle of the joint and brings two bones closer together
extension increases the angle, or the distance, between two bones or parts of the body
hyperextension the extension is greater than 180 degrees
abduction moving a limb away from the midline, or median plane, of the body
adduction the movement of a limb toward the body midline
circumduction the proximal end of the limb is stationary, and its distal end moves in a circle
rotation the movement of a bone around its longitudinal axis
dorsiflexion lifting the foot so its superior surface approaches the shin
plantar flexion depressing the foot (pointing the toes)
inversion turn the sole of the foot medially
eversion turn the sole of the foot laterally
supination when the forearm rotates laterally so that the palm faces anteriorly and the radius and ulna are parallel
pronation when the forearm rotates medially so that the palm faces posteriorly
opposition the saddle joint, in the palm of the hand, between metacarpal1 and carpals allows opposition of the thumb
Created by: lizhopper2