deck_8283638 Flashcards
(34 cards)
Masseter
name the origin, insertion, and action
O- Zygomatic arch
I- Ramus of Mandible
A- Elevates mandible (closes jaw)
Sternocleidomastoid
name the origin, insertion, and action
O-Sternum(manubrium) and Clavicle (medial portion)
I- Mastoid process of the temporal bone
A-Both sides contract=neck flexion
one side contracts= neck rotation
Serratus Anterior
name the origin, insertion, and action
O- first 9 ribs
I- vertebral border of scapula (underside/anterior portion) (medial)
A- Abducts scapula/protracts scapula
Rhomboids
name the origin, insertion, and action
O-Spines of C7-T5 vertebrae
I- medial border of the scapula
A=scapula adduct/retraction
Trapezius
name the origin, insertion, and action
O- (1) occipital bone
(2) ligamentum nuchae
(3) Spines C7-T12 (all thoracic)
I- (1) clavicle {lateral 1/3}
(2) acromion process
(3) spine of scapula
A-Rotation, retraction, elevation, and depression of scapulaPectoralis major
name the origin, insertion, and action
O-(1) clavicle, sternum
(2) costal cartilages of ribs 2-6
(3)external oblique muscle
I-greater tubercle of the humerus
A-Flexes and adducts humerus (and medially rotates humerus)Latissimus Dorsi
name the origin, insertion, and action
O- (1)spinous processes T7 through the sacrum
(2) posterior iliac crest
(3) lumbodorsal fascia
I- intertubercular groove of the humerus
A- extends, adducts, and medially rotates the humerus
deltoid
name the origin, insertion, and action
O- (1) clavicle
(2) acromion process
(3) Spine of scapula
I- Deltoid tuberosity of humerus
A-Shoulder abduction, flexion, and extensionSupraspinatus
name the origin, insertion, and action
O- Supraspinous fossa
I- greater tubercle of the humerus
A- Abducts arm
Infraspinatus
name the origin, insertion, and action
O- infraspinous fossa (backside)
I- greater tubercle of the humerus
A- rotates arm laterally
(holds the head of the humerus in the glenoid cavity)
Teres minor
name the origin, insertion, and action
O-lateral border of the scapula
I- Greater tubercle of the humerus
A- rotates arm laterally
Subscapularis
name the origin, insertion, and action
O- subscapular fossa (front side)
I- lesser tubercle of the humerus
A- rotates arm medially
Biceps brachii
name the origin, insertion, and action
O- scapula
I- radial tuberosity
A-flexes forearm (elbow) and supinates forearm (palms face upward)
Triceps Brachii
name the origin, insertion, and action
O-(1) long head: below the glenoid fossa
(2) medial head: posterior surface of the humerus distally
(3) Lateral head: lateral and posterior shaft of the humerus proximally
I- Olecranon process of ulna
A- extends forearm (elbow)
Wrist/finger extensors
name the origin, insertion, and action
O-lateral epicondyle of the humerus
I- Various insertions, name of the muscle lead to the insertion location
(example: given the wrist extensor Extensor carpi radialis longus the insertion would the 2nd metacarpal base)
A- Abducts/extends the wrist (think lateral movement of the wrist)
wrist/finger flexors
name the origin, insertion, and action
O-medial epicondyle of the humerus
I- the name gives you the muscle
A- wrist and finger flexion (wrist is closing the angle)
Gluteus maximus
name the origin, insertion, and action
O- (1) Iliac crest
(2) sacrum
(3) coccyx
I- gluteal tuberosity of the femur (on the lateral side of the femur)
A- extends thigh (hip joint)Gluteus Medius
name the origin, insertion, and action
O- ilium
I- greater trochanter of femur
A- abducts thigh and medially rotates the thigh
Tensor fasciae lata
name the origin, insertion, and action
O- iliac crest (anterior part)
I- Iliotibial tract (ITB)
A- flexes and abducts the hip
Hip adductor muscles
Name the 3 muscles first
then name the origin, insertion, and action
Names- (1)adductor magnus [most posterior
(2)adductor brevis
(3)adductor longus [most anterior]
O- All originate on the pubis (pelvis)
I- All insert on the linea aspera of the femur (posterior)
A-Adduct the thigh
what are the muscles that act on the knee joint of the lower leg? (3)
(1) quads
(2) hamstrings
(3) sartorius
Quads
Name the 3 muscles first
then name the origin, insertion, and action
names- (1) vastus medius
(2) vastus intermedius
(3) vastus lateralis
O- All originate on the anterior side of the femur
I- All insert on the tibial tubercle
(join th patellar tendon)
A-All extend the kneeHamstrings
name the 3 muscles first
then name the origin, insertion, and action
names- (1) Biceps femoris
(2)Semimembranosus
(3) semitendinosus
O-All originate on the ischial tuberosity (pelvis)
I- (1) Biceps femoris: head of the fibula
(2)Semimembranosus: medial condyle of the tibia
(3) semitendinosus: proximal surface of the tibia
A- All flex the knee
Sartorius
name the origin, insertion, and action
O- Anterior superior iliac spine
I- medial surface, proximal tibia
A-Flexion of hip/knee, Hip abduction/lateral rotation
