Specific muscles and function

xehozezu's version from 2016-03-07 23:22

Section 1

Question Answer
Frontalisraises eyebrows, wrinkle forehead
Occipitalistenses and retracts scalp
Temporaliselevates mandible
Orbicularis Oculicloses eye
Zygomaticus majorretracts and elevates the corner of the mouth
Orbicularis Oriscompresses and purses lip
Mentaliselevates and protrudes lip
Platysmatenses skin of neck, depresses mandible, pulls lower lip down
Masseterelevates mandible, closes jaw

Section 2

Question Answer
Buccinatorcompresses cheek; whistling or sucking
Masseterelevates mandible, closes jaw
Sternocleidomastoidflexes neck
Rectus Abdominusdepresses ribs, flexes vertebral column
External Obliquecompresses abdomen, depresses ribs, flexes or bends spine
Internal Obliquecompresses abdomen, depresses ribs, flexes or bends spine
Transversus Abdominuscompresses abdomen, depresses ribs, flexes or bends spine
Diaphragmexpands thoracic cavity, compresses abdominopelvic cavity
Subclaviusdepresses and protracts shoulder
Pectoralis minordepresses and protracts shoulder, rotates scapula so glenoid cavity moves inferiorly
Serratus anteriorprotracts shoulder, rotates scapula so glenoid cavity moves superiorly

Section 3

Question Answer
Internal Intercostalsdepresses ribs
External Intercostalselevates ribs
Trapeziusextends clavicle, extends neck
Levator Scapulaeelevates scapula
Rhomboid majoradducts scapula and performs downward rotation
Rhomboid minoradducts scapula and performs downward rotation
Iliocostalisextends vertebral column
Longissimusextends vertebral column
Spinalis Thoracisextends vertebral column

Section 4

Question Answer

Section 5

Question Answer
Iliacusprime mover for flexing thigh or for flexing trunk on thigh
Psoas Majorprimer mover for flexing thigh or for flexing trunk on thigh AND also effects lateral flexion of vertebral column
Sartoriusflexes, abducts and laterally rotates thight; flexes knee
Adductor Magnusadducts and medially rotates and flexes thigh
Adductor Longusadducts, flexes and medially rotates thigh
Pectineusadducts, flexes and medially rotates thigh
Gracilisadducts thigh, flexes and medially rotates leg
Rectoris Femorisextends knee and flexes thigh at hip

Section 6

Question Answer
Coracobrachialisflexion and adduction of the humerus
Triceps Brachiipowerful forearm extensor
Biceps Brachiiflexes elbow joint and supinates forearm
Brachialisa major forearm flexor
Brachioradialissyngergist in forearm flexion
Pronator Terespronates forearm
Flexor Carpi Radialispowerful flexor of wrist; adducts hand
Palmaris Longustenses skin and fascia of palm during hand movement
Flexor Carpi Ulnarispowerful flexor of wrist; also adducts hand

Section 7

Question Answer
Flexor Pollicus Longusflexes digital phalanx of thumb
Flexor Digitorum Profundusflexes distal interphalangeal joints
Extensor Carpi Ulnarisextends wrist; adducts wrist
Extensor Digitorumprimer mover of finger extension
Extensor Carpi Radialis Brevisextends and abducts wrist
Extensor Carpi Raidialis Longusextends wrist; abducts wrist
Extensor Pollicus Brevisextends thumb
Extensor Pollicus Longus extends thumb
Supinatorassists biceps brachii to forcibly supinate forearm

Section 8

Question Answer
Pectoralis Majorprimer mover of arm flexion; rotates arm medially; adducts arm
Supraspinatusiniates adduction; stabilize shoulder joint
Infraspinatusrotates humerus laterally
Teres Minorrotates humers laterally
Teres Majorextends; medially rotates and adducts humerus
Subscapularischief medially rotator of humerus
Deltoidprimer mover of arm abduction when all its fibers contract simultaneously

Section 9

Question Answer
Vastus Lateralisextends and stablizes knee
Vastus Medialisextends knee
Vastus Intermediusextends knee
Tensor Fasciae Lataesteadies knee and trunk on thigh by making iliotibial tract taut
Gluteus Maximusmajor extensor of thigh
Gluteus Mediusabducts and medially rotates thigh
Piriformisrotatoes extended thigh laterally
Guadratus Femorisrotates thigh laterally and stabilizes hio joint

Section 10

Question Answer
Biceps Femorisextends thigh and flexes knee
Semitendinosusextends thigh and flexes knee
Semimembranosusextends thigh and flexes knee
Tibialis Anteriorprimer mover of dorsiflexion
Extensor Digitorum Longusprimer mover of toe extension
Extensor Hallicus Longusextends great toe
Fibularis Longusplantar flexes and everts foot
Fibularis Brevisplantar flexes and everts foot

Section 11

Question Answer
Gastrocnemiusplantar flexes foot
Soleusplantar flexes foot
Plantarisassists in knee flexion and plantar flexion of foot
Popliteusflexes and rotates leg medially to uinlock extended knee when flexion begins
Flexor Digitorum Longusplantar flexes and inverts foot; flexes toes
Flexor Hallicus Longusplantar flxes and inverts foot; flexes great toe at all joints
Tibialis Posteriorprimer mover of foot inversion

Section 12