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Muscle Study Guide

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treannbhomas's version from 2017-03-17 18:45

Section 1

Question Answer
FrontalisO: Galea aponeurotica A: raises eyebrows
OccipitalisO: occipital and temporal bones A: draws scalp backward I: Galea aponeurotica
Orbicularis oculiO: frontal and maxillary bones and ligaments around orbit A:closes eye
Orbicularis orisA: closes lips
Levator labii superiorisO: zygomatic bone and infraorbital margin of maxilla A: opens lips
Depressor labii inferiorisO: mandible A: draws lower lip inferiorly
Depressor anguli orisO: mandible A: draws angle of mouth laterally and inefriorly
Zygomaticus minorO: zygomatic bone A: raises the upper lip to expose the teeth
Zygomaticus majorO: zygomatic bone A: draws corners of mouth upward
BuccinatorO: molar region of maxilla and mandible A: compress cheek
MentalisA: wrinkles chin
memorize

Section 2

Question Answer
MasseterO: zygomatic arch and maxilla A: prime mover of jaw closure I: angle and ramus of mandible
Temporalis O: temporal fossa A: elevates and retracts mandible, closes jaw I: coronoid process of mandible
memorize

Section 3

Question Answer
GenioglossusA: protrudes and depresses tounge
memorize

Section 4

Question Answer
SternocleidomastoidO: manubrium and medial clavicle A: flexes neck, rotates head toward shoulder on opposite side I: mastoid process of temporal bone
ScalenesA: flex and rotate the head, aid in deep respiration
Splenius capitisA: extends, rotates and laterally flexes the head
DigastricO: lower margin of mandible and mastoid process A: opens mouth and depresses mandible I: hyoid
StylohyoidO: styloid process of temporal bone A: elevates and retracts hyoid bone I: hyoid
SternohyoidO: manubrium, medial clavicle A: depress hyoid and larynx
OmohyoidO: superior border of scapula A: depresses and retracts hyoid I: hyoid
ThyrohyoidO: thyroid cartilage A: depresses hyoid, elevates larynx I: hyoid
MylohyoidO: mandible A: elevates hyoid, depresses mandible I: hyoid
GeniohyoidO: mandible A: elevates hyoid, depresses mandible, draws tongue anteriorly I: hyoid
memorize

Section 5

Question Answer
External intercostalsA: elevate ribs
Internal intercostals A: depress ribs in forceful expiration
DiaphragmO: xiphoid process, ribs 7-12, lumber vertebrae A: respiration I: central tendon
Rectus abdominis O: pubis crest and symphysis A: flexes vertebral column, compresses abdomen I:xiphoid process and ribs 5-7
External obliqueO: anterior surface of last 8 ribs A: aids in trunk rotation and lateral flexion, compresses abdomen I: linea alba
Internal obliqueA: aids in trunk rotation and lateral flexion, compresses abdomen I: linea alba, ribs 9-12, pubic crest
Transverse abdominisA: compress abdomen
memorize

Section 6

Question Answer
Pectorialis minor O: anterior surface ribs 3-5 A: protracts and depresses shoulder I: coracoid process of scapula
Serratus anterior A: protracts and aids in upward rotation of scapula
TrapeziusA: elevates, retracts, and rotates scapula
Rhomboid major A: adduct, downward rotation of scapula
Rhomboid minor A: adduct, downward rotation of scapula
Levator scapulae A: elevates scapula
memorize

Section 7

Question Answer
DeltoidO: acromion and spine of scapula A: prime mover of arm abduction I: deltoid tuberosity
Pectoralis major O: clavicle, sternum, cartilage of ribs 1-6 A: prime mover of arm flexion, adducts, medially rotates arm I: intertubercular sulcus of humerus
Latissimus dorsi A: prime mover of arm extension, adduct, medially rotates arm
CoracobrachialisA: adduction, flexion of arm
Biceps brachiiO (long head): intertubercular sulcus of shoulder O (short head): coracoid process A: flexes elbow and shoulder; supinates forearm I: radial tuberosity
Triceps brachiiO (long head): inferior margin of glenoid cavity O (lateral head): posterior humerus O (medial head): distal radial groove (on posterior humerus) A: extends forearm I: olecranon process
Teres majorA: adducts, extends, and medially rotates arm
AnconeusA: extends forearm at elbow joint
SubscapularisO: subscapular fossa A: medially rotates arm
SupraspinatusO: supraspinous fossa A: abducts arm
InfraspinatusO: infraspinous fossa A: laterally rotates arm
Teres minorO: lateral margin of scapula A: laterally rotates arm
memorize

Section 8

Question Answer
Brachialis (deep to biceps brachii)A: flexes forearm
BrachioradialisA: flexes forearm
Pronator teresA: pronates forearm
SupinatorA: supinates forearm
Pronator quadratusA: pronates forearm
Palmaris longusA: tenses skin and fascia of palm
Flexor carpi radialisA: flexes wrist and abducts hand
Flexor carpi ulnarisA: flexes wrist and adducts hand
Extensor carpi radialis longusA: extends wrist, abducts hand
Extensor carpi radialis brevisA: extends wrist, abducts hand
Extensor carpi ulnarisA: extends wrist; adducts hand
Flexor digitorum superficialisA: flexes fingers and wrist
Extensor digitorumA: extends fingers
Abductor pollicis longusA: abducts and extends thumb
Extensor pollicis brevisA: extends thumb
memorize

Section 9

Question Answer
Flexor pollicis brevisA: flexes thumb
Abductor pollicis brevisA: abducts thumb
Abductor digiti minimiA: abducts little finger
External anal sphincterA: keeps anal canal closed
Internal anal sphincterA: keeps anal canal closed
Levator aniA: supports pelvic viscera
memorize

Section 10

Question Answer
SartoriusO: anterior superior iliac spine A: flex, abducts, and laterally rotates thigh; flexes knee I: superior medial surface of tibia
Rectus femorisO: anterior inferior iliac spine A: flex thigh, extend knee I: tibial tuberosity and patella
Vastus lateralisO: greater trochanter A: extends knee I: tibial tuberosity and patella
Vastus medialisO: linea aspera A: extends knee I: tibial tuberosity and patella
Vastus intermedius (deep)A: extends knee I: tibial tuberosity and patella
Tensor fasciae lataeA: flexes and laterally rotates thigh
Iliopsoas (combined psoas major and iliacus)A: flexes thigh (most powerful flexor)
Adductors brevis, longus, magnusA: adduction, flexion, rotation of thigh
GracilisO: pubis A: adduct and medially rotates thigh I: superior medial surface of tibia
PectineusA: adducts and flexes thigh
Obturator internusA: abducts thigh; stabilizes the hip during walking
PiriformisO: sacrum A: laterally rotates thigh I: greater trochanter
Gluteus maximusO: dorsal ilium, coccyx, and sacrum A: extends, abducts, and laterally rotates thigh I: gluteal tuberosity
Gluteus mediusA: abducts and medially rotates thigh
Quadratus femorisO: ischial tuberosity A: laterally rotates and adducts thigh I: intertrochanteric crest
Biceps femoris O (long head) ischial tuberosity, O (short head) linea aspera A: extends thigh, flexes knee I: head of fibula and lateral condyle of tibia
SemitendinosusO: ischial tuberosity A: extends thigh, flexes knee I: superior medial aspect of tibia
SemimembranosusO: ischial tuberosity A: extends thigh, flexes knee I: medial condyle of tibia
GastrocnemiusO: medial and lateral condyles of femur A: plantar flexes foot, flexes knee I: calcaneus (via the calcaneal tendon)
Tibialis anteriorO: lateral condyle and upper portion of tibia A: dorsiflexes and everts of foot I: medial cuneiform and first metatarsal
Extensor digitorum longusA: extends the toes
Extensor digitorum brevis A: helps extend toes at metatarsophalangeal joints
Extensor hallucis longusA: dorsiflexes foot and extends hallux (great toe)
Fibularis (peroneus) longusA: plantar flexes and everts foot
Fibularis (peroneus) brevisA: plantar flexes and everts foot
SoleusO: head of fibula, medial border of tibia A: plantar flexes foot I: calcaneus (via the calcaneal tendon)
Flexor digitorum longusA: flex toes, plantar flexes, and inverts foot
Tibialis posteriorA: prime mover of foot inversion
Flexor hallucis longusA: flexes hallux (great toe)
Abductor hallucisA: abducts hallux (great toe)
Abductor digiti minimiA: abducts and flexes little toe
Flexor digitorum brevisA: helps flex toes
memorize