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Specific muscles and function

pihebifa's version from 2018-03-16 21:03

Section 1

Question Answer
Frontal Belly or Frontalisraises eyebrows
Occipital Belly or Occipitalisfixes aponeurosis and pulls scalp posteriorly
Temporaliscloses jaw
Orbicularis Oculicloses eye
Zygomaticusraises lateral corners of mouth upward
Risoriusdraws corners of lip laterally
Depressor Labii Inferiorisdraws lower lip inferiorly; pout
Depressor Angii Orisdraws corner of mouth downward and laterally; grimace
Orbicularis Oriscloses lips; kissing
Mentaliswrinkles chin; protruding lower lip

Section 2

Question Answer
Buccinatorcompresses cheek; whistling or sucking
Masseterprimer mover of jaw closure
Digastricopens mouth, depresses mandible
Stylohyoidelevates and retracts hyoid
Mylohyoidelevates hyoid bone and floor of mouth
Sternocleidomastoidflexes and laterally rotates the head
Scaleneselevates the first two ribs
Splenius Capitisextrend or hyperextend head
Trapeziusstablizes, raises, retracts and rotates the scapula
Latissimus Dorsiprime mover of arm extension; powerful arm adductor; mediall rotates at shoulder
Rhomboids Minor and Majorretracts, and elevates (stabilizes) the scapula
Erector Spinaeprimer mover of back extension
Quadratus Lumborumflexes vertebral colmun laterally

Section 3

Question Answer
Internal Intercostalsdraws ribs together and depresses rib cage
External Intercostalspulls ribs toward one anothe to elevate rib cage
Diaphragmprimer mover inspiration; flattens on contraction
Pectoralis Minorwith ribs fixed, draws scapula forward and downward
Pectoralis Majorprimer mover of arm flexion, rotates arm medially , adducts arm
Serratus Anteriorrotates scapula so that is inferior angle moves laterally and upward
Rectus Abdominisflexes and rotate lumbar region of vertebral column
External Obliqueflexes vertebral column and compresses abdominal wall; trunk rotation and lateral flexion
Transverse Abdominiscompresses abdominal contents

Section 4

Question Answer

Section 5

Question Answer
Iliacusflexor of thigh at hip joint
Psoas Majorflexor of thigh at hip joint
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
Rectus 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 hip joint

Section 10

Question Answer
Biceps Femorisextends thigh or hip joint and flexes knee joint
Semitendinosusextends thigh/hip joint and flexes knee
Semimembranosusextends thigh/hip joint 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/ankle joint, flex at the knee
Soleusplantar flexes foot/ ankle joint
Plantarisassists in knee joint flexion and plantar flexion ankle joint
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