A&P Final Review - Muscle Locations & Functions

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amysmith727@student.athenstech.edu
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89657
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A&P Final Review - Muscle Locations & Functions
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2011-06-07 15:06:32
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Anatomy Muscles
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A&P Final exam review - Muscle locations and functions
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  1. Which muscles are the Prime Movers
    • Latissimus dorsi
    • Pectoralis major
    • Biceps brachii
    • Triceps brachii
    • Quadriceps group:
    • Serratus anterior

    • Rectus femoris
    • Vastus lateralis, medialis and intermedius

    Hamstring Group:

    • Biceps femoris
    • Semitendinosus
    • Semimembranosus
  2. what are the muscles of mastication
    • Buccinator
    • Masseter
    • Temporalis
  3. Sternocloidomastoid
    • deep to platysma
    • on anterolateral surface of neck. 2 parts.

    flexes and laterally rotates head.
  4. Trapezius
    • most superficial of posterior thorax
    • originates in occipital bone
    • insertion along acromion and spine of scapula

    Stabilizes, raises, retracts, rotates the SCAPULA
  5. Latissimus dorsi

    PRIME MOVER
    • flat muscle of lower back
    • lumbar regions.
    • origin lower 6 thoracic vert., lower ribs, iliac crest, scapula's inf. angle

    • PRIME MOVER of arm EXTENSION
    • Arm adductor
    • Medially rotates arm at shoulder
  6. Pectoralis major

    PRIME MOVER

    Pecs flex
    • fan shaped on superior chest
    • forms anterior axillary fold.

    • PRIME MOVER of arm FLEXION
    • rotates arm medially
    • adducts arm against resistance
  7. Serratus anterior

    PRIME MOVER
    • fan shaped, deep to scapula
    • on entire anterior serface of vertebral border of scapula
    • Rotates scapula so that inferior angle goes laterally and Upward.
  8. Rectus abdominus
    straight muscle pair from pubis to rib cage

    flexes and rotates lumbar region of spine.
  9. External Obique
    largest of lat muscles

    pair contract together: flex spine, compress ab. wall.

    individually; trunk rotation and lat. flexion.
  10. External and Internal intercostals
    External: 11 pairs between ribs. Fibers run down and forward.

    Pull Ribs toward one another to ELEVATE rib cabe. (external, forward, elevate)

    Internal: 11 pairs run down and back

    • Pull ribs together and depress rib cage. to aid in forced expiration
    • (internal, back, exhale)
  11. Diaphragm:
    pierced by aorta, inferior vena cava and esophagus.

    forms floor of thoracic cavity

    • PRIME MOVER of Inspiration. Flattens on contraction.
    • increases vert. dimensions of thorax
    • increases intra-abdominal pressure.
  12. Deltoid
    rounded part of shoulder

    PRIME MOVER of arm abduction when all fibers go simultaneously.

    antagonist of pecs and lat. dorsi

    can do flex and med. rotation of humerus with anterior fibers.

    can do extension and lateral rotation of arm with posterior fibers.
  13. Biceps brachii

    PRIME MOVER
    • Prime mover:
    • 2 headed muscle

    • stabilizes shoulder joint
    • flexes elbow
    • supinates forearm
  14. Psoas major
    • under inguinal ligament
    • (tenderloin)
    • longer, thicker, medial of pair
    • PRIME MOVER of THIGH FLEX or TRUNK flex on THIGH
  15. Sartorius
    long straplike muscle oblique from thigh to knee

    • FLexes, Abducts, laterally rotates thigh
    • flexes knee
  16. Gracilis
    long thin muscle of medial thigh

    • ADDUCTS thigh,
    • flexes and medially rotates leg.
  17. Adductor Group
    Adductor Longus: big one over the middle of the magnus:

    Adducts, flexes, medially rotates thigh

    Adductor magnus: adducts, medially rotates thigh, and back part goes with hamstrings in THIGH EXTENSION
  18. Quadriceps Group:
    Rectus femoris: straight down thigh

    extends knee, flexes thigh at hip

    Vastus lateralis: lateral part of thigh

    extends and stabilizes knee

    Vastus medials: inferomedial aspect of thigh

    Extends knee

    • Vastus intermedius: hiding under femoris. between v. lat and v. med. on anterior thigh.
    • Extends knee
  19. Gluteus maximus
    • largest glute
    • bulk of mutt mass.

    Major extensor of thigh.
  20. Hamstring Group

    PRIME MOVER
    Biceps femoris

    Semitendinosus

    Semimembranosus
  21. Gastrocnemius
    big muscle of calf

    • plantar flexes foot.
    • can flex knee if foot is dorsiflexed
  22. Soleus
    deep to gastrocnemius

    • plantar flexes foot.
    • important for dancing, walking, running

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