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A&P > deck_8283638 > Flashcards

deck_8283638 Flashcards

1
Q

Masseter

name the origin, insertion, and action

A

O- Zygomatic arch
I- Ramus of Mandible
A- Elevates mandible (closes jaw)

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2
Q

Sternocleidomastoid

name the origin, insertion, and action

A

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

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3
Q

Serratus Anterior

name the origin, insertion, and action

A

O- first 9 ribs
I- vertebral border of scapula (underside/anterior portion) (medial)
A- Abducts scapula/protracts scapula

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4
Q

Rhomboids

name the origin, insertion, and action

A

O-Spines of C7-T5 vertebrae
I- medial border of the scapula
A=scapula adduct/retraction

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5
Q

Trapezius

name the origin, insertion, and action

A 
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 scapula
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6
Q

Pectoralis major

name the origin, insertion, and action

A 
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)
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7
Q

Latissimus Dorsi

name the origin, insertion, and action

A

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

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8
Q

deltoid

name the origin, insertion, and action

A 
O- (1) clavicle 
     (2) acromion process
     (3) Spine of scapula
I- Deltoid tuberosity of humerus
A-Shoulder abduction, flexion, and extension
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9
Q

Supraspinatus

name the origin, insertion, and action

A

O- Supraspinous fossa
I- greater tubercle of the humerus
A- Abducts arm

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10
Q

Infraspinatus

name the origin, insertion, and action

A

O- infraspinous fossa (backside)
I- greater tubercle of the humerus
A- rotates arm laterally
(holds the head of the humerus in the glenoid cavity)

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11
Q

Teres minor

name the origin, insertion, and action

A

O-lateral border of the scapula
I- Greater tubercle of the humerus
A- rotates arm laterally

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12
Q

Subscapularis

name the origin, insertion, and action

A

O- subscapular fossa (front side)
I- lesser tubercle of the humerus
A- rotates arm medially

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13
Q

Biceps brachii

name the origin, insertion, and action

A

O- scapula
I- radial tuberosity
A-flexes forearm (elbow) and supinates forearm (palms face upward)

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14
Q

Triceps Brachii

name the origin, insertion, and action

A

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)

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15
Q

Wrist/finger extensors

name the origin, insertion, and action

A

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)

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16
Q

wrist/finger flexors

name the origin, insertion, and action

A

O-medial epicondyle of the humerus
I- the name gives you the muscle
A- wrist and finger flexion (wrist is closing the angle)

17
Q

Gluteus maximus

name the origin, insertion, and action

A 
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)
18
Q

Gluteus Medius

name the origin, insertion, and action

A

O- ilium
I- greater trochanter of femur
A- abducts thigh and medially rotates the thigh

19
Q

Tensor fasciae lata

name the origin, insertion, and action

A

O- iliac crest (anterior part)
I- Iliotibial tract (ITB)
A- flexes and abducts the hip

20
Q

Hip adductor muscles
Name the 3 muscles first
then name the origin, insertion, and action

A

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

21
Q

what are the muscles that act on the knee joint of the lower leg? (3)

A

(1) quads
(2) hamstrings
(3) sartorius

22
Q

Quads
Name the 3 muscles first
then name the origin, insertion, and action

A 
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 knee
23
Q

Hamstrings
name the 3 muscles first
then name the origin, insertion, and action

A

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

24
Q

Sartorius

name the origin, insertion, and action

A

O- Anterior superior iliac spine
I- medial surface, proximal tibia
A-Flexion of hip/knee, Hip abduction/lateral rotation

25
Q

Tibialis Anterior

name the origin, insertion, and action

A

O-lateral condyle and body of the tibia
I- metatarsal 1 (Big toe side)
A-dorsiflexion of the foot (upward movement)

26
Q

Gastrocnemius

name the origin, insertion, and action

A

O- above lateral and medial condyles of the femur
I- calcaneus by way of the Achilles tendon
(lateral to the talus)
A- plantar flexion of the foot

27
Q

what is the action of the Diaphragm

A

A- increases size of the thoracic cavity fro breathing

28
Q

External intercostals

name the origin, insertion, and action

A

O-one rib (lower border)
I- next rib (upper border)
A- breathing (elevates ribs)

29
Q

internal intercostals

name the origin, insertion, and action

A

O-one rib (lower border)
I- next rib (upper border)
A- breathing (depresses ribs)

30
Q

what is the action of the erector spinae

A

A- extends the vertebral column and bends it laterally

31
Q

External abdominal oblique
name the origin, insertion, and action
(remember hands in pockets)

A

O- the lower 8 ribs
I- linea alba and iliac crest
A- compress abdomen; flexion of spine
(moving the chest downward)

32
Q

internal abdominal oblique

name the origin, insertion, and action

A

O-iliac crest and thoracolumbar facia
I- linea alba and lower ribs
A- compresses the abdomen, spinal flexion

33
Q

Transversus abdominis

name the origin, insertion, and action

A 
O- (1) Illiac crest
     (2)lumbar fascia
     (3)costal cartilage of the lower ribs (7-12)
I-linea alba and pubis (pelvis)
A-compresses the abdomen
34
Q

Rectus abdominis

A

“six pack muscles”
O- pubic symphysis
I- Xiphoid process (inferior part of the sternum) and costal cartilage of ribs 5-7
A- spinal flexion, compresses the abdomen

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