A and P lab exam 3

frontalis orgin

Galea aponeurotica (broad band of connective tissue on superior surface of skull)

frontalis insertion

skin of forehead

frontalis action

wrinkles forehead skin and elevates eyebrows

orbicular oris origin

mandible and maxillary via muscle fibers surrounding lips

orbicular oris insertion

lips

orbicular oris action

closes and presses lips against teeth;protrudes lips during speech and kissing

sternocleidomastoid origin

sternum (manubrium) and clavicle

sternocleidomastoid insertion

temporal bone (mastoid process)

sternocleidomastoid action

contraction of both:flexes the head at the neck. Contraction of one:tilts the head towards the shoulder of the contracting muscle and rotates the face to the opposite side

Masseter origin

zygomatic arch

masseter insertion

mandible (ramus)

Masseter action

muscle of mastication; elevates mandible; protracts mandible

Temporalis origin

temporal bone

temporalis insertion

mandible

temporalis action

muscle of mastication; elevates and retracts mandible

Trapezius origin

Midline of neck and back: occipital bone, ligamentum nuchae, spinous process of thoracic vertebrae

trapezius insertion

clavicle and scapula (acromion and spine)

trapezius action

several nerves supply different parts of the trapezius providing a variety of possible actions depending on which part is stimulated; extends heads; elevates and depresses and rotates scapula; elevates clavicle

Pectoralis Major origin

clavicle, sternum, costal cartilage

pectoralis major insertion

humerus (intertubular groove)

pectoralis major action

flexes, adducts and relates humerus medially

deltoid origin

clavicle and scapula

deltoid insertion

humerus (deltoid tuberosity)

deltoid action

abducts humerus

latissimus dorsi origin

midline of lower back; lumbodorsal fascia; spinous process of lower thoracic and lumbar vertebrae; lower ribs

latissimus dorsi insertion

humorous (intertubercular groove)

latissimus dorsi action

extends, adducts and rotates humerus medially (compare to action of pectoralis major

external intercostals origin

inferior border of the upper rib

external intercostals origin

inferior border of lower rib

external intercostals insertion

superior border of lower rib

external intercostals action

muscle of respiration; elevates rib cage in normal inspiration

supraspinatus origin

scapula (posterior surface, superior to spine)

supraspinatus insertion

humerus (greater tubercle)

supraspinatus action

abducts humerus (shoulder)

infraspinatus origin

scapula (posterior surface inferior to spine)

infraspinatus action

rotates humerus laterally (shoulder)

infraspinatus insertion

humerus (greater tubercle)

subscapularis origin

scapula (anterior surface)

subscapularis insertion

humerus (lesser tubercle)

subscapularis action

rotate humerus medially (shoulder)

Teres minor origin

scapula (lateral border)

teres minor insertion

humerus (greater tubercle)

teres minor action

rotate humerus laterally (shoulder)

external oblique origin

lower ribs

external oblique insertion

Linea alba

external oblique action

contraction of both; flexes vertebral column to one side; supports and compresses abdominal viscera

rectus abdominis origin

pubis

rectus abdominis insertion

sternum (xiphoid process) and costal cartilages of some ribs

rectus abdominis action

flexes vertebral column;supports and compresses abdominal viscera

brachialis origin

anterior humerus

brachialis insertion

ulna

brachialis action

flexes elbow

brachioradialis origin

humerus

brachioradialis insertion

radius (near styloid process)

brachioradialis action

flexes elbow

triceps brachii origin

lateral head: lateral humerus , medial head: posterior humerus, long head: scapula (tubercle below glenoid cavity)

triceps brachii insertion

ulna (olecranon process)

Sartorius origin

Ilium (anterior superior iliac spine)

sartorius insertion

medial tibia

sartorius action

flexes both hips and knee and rotates thigh laterally

gracilis origin

pubis

gracilis insertion

medial tibia

gracilis action

abducts femur; flexes knee

adductor longus origin

pubis

adductor longus insertion

femur (linea aspera)

adductor longus action

adducts and flexes thigh

adductor magnus origin

pubis and ischium (ischial tuberosity)

adductor magnus insertion

femur (linea aspera)

adductor magnus action

adducts and extends thigh

rectus femoris origin

Ilium (anterior inferior iliac spine)

rectus femoris insertion

all oof the quadriceps femoris have a common tendon called the patellas ligament which inserts on the tibia (tibial tuberosity - the rough area between the medial and lateral condyles)

rectus femoris action

extends knee; flexes hip

vastus lateralis origin

femur (greater trochanter)

vastus lateralis insertion

all of the quadriceps femoris have a common tendon called the patellas ligament which inserts on the tibia (tibial tuberosity - the rough area between the medial and lateral condyles)

vastus lateralis action

extends knee

vastus medialis origin

femur (linea aspera)

vastus medialis insertion

all of the quadriceps femoris have a common tendon called the patellas ligament which inserts on the tibia (tibial tuberosity - the rough area between the medial and lateral condyles)

vastus medialis action

extends knee

vastus intermedius origin

femur (anterior and lateral aspects)

vastus intermedius insertion

all of the quadriceps femoris have a common tendon called the patellas ligament which inserts on the tibia (tibial tuberosity - the rough area between the medial and lateral condyles)

vastus intermedius action

extends knee

tibialis anterior origin

tibia (lateral condyle and shaft)

tibialis anterior insertion

tarsal and meta tarsal

tibialis anterior action

dorsiflexes and inverts foot

gluteus maximus origin

pelvis (ilian, sacrum, coccyx) and lumbodorsal fascia

gluteus maximus insertion

Iliotibial tract ( a fibrous band on the lateral surface of the leg, inserts on lateral tibia); femurs

gluteus maximus action

extends and rotates femur laterally

gluteus medius origin

Ilium (lateral surface)

gluteus medius insertion

femur (greater trochanter)

gluteus medius action

abducts and medially rotates thigh

Biceps femoris origin

long head: ischium (ischial tuberosity) short head: femur (linea aspera)

biceps femoris insertion

fibula (hhead) and tibia (lateral condyle)

biceps femoris action

flexes knee ; extends thigh at hip

semitendinosus origin

Ischium (ischial tuberosity)

semitendinosus insertion

medial tibia

semitendinosus action

flexes knee; extends femur at hip

semimembranosus origin

Ischium (ischial tuberosity)

semimembranosus insertion

Tibia ( medial condyle)

semimembranosus action

flexes knee; extends femur at hip

gastrocnemius origin

Femur (lateral and medial condyle)