Anat Lab Muscle Pa, Da And Actions

Front 1

Frontalis Action

Back 1

Raises eyebrows and wrinkles forehead

Front 2

Nasalis A

Back 2

Lifts/flares nostrils

Front 3

Orbicularis oculi Action

Back 3

Closes eyelids

Front 4

Orbicularis Oris Action

Back 4

Compressed and protrudes lips

Front 5

Zygomaticus Action

Back 5

Pulls angle of mouth superiorly and laterally

Front 6

Levator labii superioris A

Back 6

Elevates the upper lip

Front 7

Depressor labii inferioris A

Back 7

Depresses lower lip

Front 8

Levator anguli oris A

Back 8

Elevates angle of the mouth

Front 9

Depressor anguli oris A

Back 9

Depresses angle of mouth

Front 10

Temporalis (PDA)

Back 10

PA: lateral surface of cranium

DA: cornoid process of mandible

Action: elevates, retracts and laterally moves mandible

Front 11

Masseter (PDA)

Back 11

PA: zygomatic arch

DA: mandible

Action: elevates and protracts mandible

Front 12

Sternocleidomastoid (PDA)

Back 12

PA: sternum and clavicle

DA: mastoid process

Action: tilts head to same side, rotates head to opposite side

Front 13

Rectus Abdominis Action

Back 13

Flexes the vertebral column

Front 14

Teres minor (PDA)

Back 14

PA: lateral border of scapula

DA: greater tubercle

Action: laterally rotates arm

Front 15

Supraspinatus

Back 15

PA: supraspinous fossa

DA: greater tubercle

Action: abducts arm

Front 16

Infraspinatus

Back 16

PA: infraspinous fossa

DA: greater tubercle

Action: laterally rotates arm

Front 17

Subscapularis

Back 17

PA: subscapular fossa

DA: lesser tubercle

Action: adducts and medially rotates arm

Front 18

Deltoid (PDA)

Back 18

PA: lateral one third of clavicle, acromion and scapular spine

DA: deltoid Tuberosity

Action: extends and flexes the shoulder; abducts the arm

Front 19

Biceps brachii - long head and short head (PDA)

Back 19

PA (long head): upper lip of glenoid cavity

PA (short head): tip of coracoid process

DA: radial Tuberosity

Action: flexes the elbow and shoulder; supinate the forearm and the hand

Front 20

Coracobrachialis (PDA)

Back 20

PA: coracoid process

DA: shaft of humerus

Action: flexes shoulder and adducts arm

Front 21

Brachialis (PDA)

Back 21

PA: shaft of humerus

DA: ulnar Tuberosity

Action: flexes the elbow

Front 22

Triceps brachii - long, lateral, and medial heads (PDA)

Back 22

PA (long head): lower lip of glenoid cavity

PA (lateral head): proximal posterlateral shaft of humerus

PA (medial head): proximal posteromedial shaft of humerus

DA: olecranon

Action: extends the elbow, extends the shoulder, adducts the arm

Front 23

Flexor carpi radialis (A)

Back 23

Flexes the wristband abducts the hand

Front 24

Flexor carpi ulnaris (A)

Back 24

Flexes the wrist and adducts the hand

Front 25

Extensor carpi radialis - longus and brevis (A)

Back 25

Extends the wrist and abducts the hand

Front 26

Extensor carpi ulnaris (A)

Back 26

Extends wrist and adducts hand

Front 27

Supinator (A)

Back 27

Supinate forearm and hand

Front 28

Pronator teres (A)

Back 28

Pronates the forearm and hand

Front 29

Pronator quadratus (A)

Back 29

Pronates forearm and hand

Front 30

Gluteus Maximus (A)

Back 30

Extends hip; laterally rotates the hip

Front 31

Sartorius (PDA)

Back 31

PA: anterior superior iliac spine

DA: medial side of tibial tuberosity

Action: flexes hip; abducts and laterally rotates thigh; flexes knee

Front 32

Rectus femoris (PDA)

Back 32

PA: anterior inferior iliac spine

DA: patella and tibial tuberosity via patellar ligament

Action: flexes hip; extends knee

Front 33

Vastus lateralis

Back 33

PA: linea aspera

DA: patella and tibial tuberosity via patellar ligament

Action: extends knee

Front 34

Vastus medialis

Back 34

PA: linea aspera

DA: patella and tibial tuberosity via patellar ligament

Action: extends knee

Front 35

Vastus intermedius

Back 35

PA: anterior shaft of femur

DA: patella and tibial tuberosity via patellar ligament

Action: extends the knee

Front 36

Semimembranosus (PDA)

Back 36

PA: ishial tuberosity

DA: posterior to the medial condyle of the tibia

Action: extends hip, flexes knee

Front 37

Semitendinosus (PDA)

Back 37

PA: ischial tuberosity

DA: medial side of tibial tuberosity

Action: extends hip; flexes knee

Front 38

Biceps femoris - long and short heads (PDA)

Back 38

PA (long head): ischial tuberosity

PA (short head): linea aspera

DA (both): head of fibula

Action (long head): extends hip, flexes knee

Action (short head): flexes knee

Front 39

Gastronemius (medial and lateral heads) (A)

Back 39

Plantar flexes the ankle, flexes the knee

Front 40

Soleus (A)

Back 40

Plantar flexes ankle

Front 41

Fibularis longus (A)

Back 41

Planter flexes ankle, everts foot

Front 42

Fibularis brevis (A)

Back 42

Plantar flexes ankle, everts foot

Front 43

Plantaris (A)

Back 43

Plantar flexes ankle, flexes knee

Front 44

Tibialis anterior (A)

Back 44

Dorsiflexes ankle, inverts foot

Front 45

Tibialis posterior (A)

Back 45

Plantar flexes ankle, inverts foot