Specific muscles and function

banisutu's version from 2017-11-01 03:49

Section 1

Question Answer
Frontal Belly or Frontalisraises eyebrows and draws scalp anteriorly
Occipital Belly or Occipitalisfixes aponeurosis and pulls scalp posteriorly
Temporaliselevates (closes) mandible
Orbicularis Oculicloses eyelid
Zygomaticus major and minorelevates corners of the mouth (in smiling and laughing)
Risoriusabducts corner of the mouth (draws edge of mouth lateral)
Depressor Labii Inferiorisdepresses inferior lip; 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; elevates (closes) mandible
Digastricopens mouth, depresses mandible; elevates hyoid bone and mandible
Stylohyoidelevates and retracts hyoid
Mylohyoidelevates hyoid bone and floor of mouth(tongue)
Sternocleidomastoidabducts, rotates, and flexes head
Scalenesflexes and rotates neck, elevates the first two ribs
Splenius Capitisextrend or hyperextend head
Trapeziusextends and abducts head, rotates and adducts scapula, fixes scapula
Latissimus Dorsiprime mover of arm extension; extends, adducts, and medially rotates humerus; draws shoulder inferiorly
Rhomboids Minor and Majoradducts scapula
Erector Spinaeprimer mover of back extension; includes ilicostalis, longissimus, spinalis; extends and rotates vertebral column and head
Quadratus Lumborumextends and adducts vertebral column

Section 3

Question Answer
Internal Intercostalselevates and depresses ribs
External Intercostalselevates ribs (increasing volume in thorax)
Pectoralis Minordepresses glenoid cavity
Pectoralis Majorprimer mover of arm flexion; flexes, adducts, and medially rotates humerus
Serratus Anteriorabducts scapula (moves scapula away from the spinal column)
Rectus Abdominisflexes vertebral column, compresses abdominal wall
External Obliquecompresses abdominal wall; laterally rotates waist
Transverse Abdominiscompresses abdominal wall, laterally rotates waist

Section 4

Question Answer

Section 5

Question Answer
Ilipsoasflexes thigh and lumbar vertebrae
adductor brevisadducts thigh
Sartoriusflexes, abducts and laterally rotates thight; flexes knee
Adductor Magnusadducts, flexes, extends and medially rotate thigh
Adductor Longusadducts, flexes,and medially rotates thigh
Pectineusadducts and flexes thigh
Gracilisflexes and medially rotates leg
Rectoris Femorisextends leg and flexes thigh

Section 6

Question Answer
Coracobrachialisflexes and medially rotates humerus
Triceps Brachiipowerful forearm extensor; extends, adducts arm, extends forearm
Biceps Brachiiflexes arm, flexes forearm, supinates forearm
Brachialisa major forearm flexor; flexes forearm
Brachioradialissyngergist in forearm flexion; flexes forearm
Pronator Terespronates and flexes forearm
Flexor Carpi Radialisflexes and abducts wrist
Palmaris Longusanchors skin and fascia of palmar region
Flexor Carpi Ulnarisflees and adducts wrist

Section 7

Question Answer
Flexor Pollicus Longusflexes thumb
Flexor Digitorum Profundusflexes phalanges, flexes wrist
Extensor Carpi Ulnarisextends and adducts wrist
Extensor Digitorumprimer mover of finger extension; extends phalanges, extends hand
Abductor pollicus longusabducts thumb
Extensor Carpi Raidialis Longusextends wrist; abducts wrist
Extensor Pollicus Brevisextends thumb
Extensor Pollicus Longus extends thumb
Supinatorsupinates forearm

Section 8

Question Answer
Pectoralis Majorflexes, adducts, and medially rotates humerus
Supraspinatusabducts arm, helps stabilize shoulder joint
Infraspinatuslaterally rotates arm, stabilizes shoulder joint
Teres Minorlaterally rotate and adducts humerus, stabilizes shoulder joint
Teres Majorextends, and medially rotates humerus
Subscapularismedially rotates arm, stabilizes shoulder joint
Deltoidabducts arm, flexes, extends, medially and laterally rotates humerus

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