Selected Skeletal Muscles

Front 1

AbdominisUnder the rectus and obliques, fibers run left to right

DOes not move the torso but can compress the abdominal area as FORCED exhalation

Back 1

Transverse AbdominisUnder the rectus and obliques, fibers run left to right

DOes not move the torso but can compress the abdominal area as FORCED exhalation

Front 2

Intercostals (Internal and External)Sets of superficial and deep muscles between ribs.

Moves the ribcage, INTERNALS assist exhalation, EXTERNALS assist inhalation

Back 2

Intercostals (Internal and External)

Front 3

Dome shaped internal muscle SEPARATING the thoracic and abdominal cavitites. Base is anchored all around thoracic wall at inferior portion of rib cage.

Flattens as it contracts normal inhalation

Back 3

Diaphragm

Front 4

Muscle Group attached to the upper rib cage

Elevates the rib cage during FORCED exhaltion

Back 4

Scalenes (6)

Front 5

Extends the thigh and rotates the thigh sideways and back

Back 5

Gluteus Maximum

Front 6

mainly ABDUCTS the thigh.

fibers run mostly straight (superior-inferior) akibg tge side if ilium

Back 6

Gluteus Medius

Front 7

Really two muscles, iliacus and psosas major, fibers run from lumbar vertebrae and upper pelvis to femur

eighter flex thigh or flex trun laterally.. may flex the entire trunk toward the thigh if both left and right muscles contract

Back 7

Iliopsoas (2)

Front 8

located on the anterior surface of forearm
''flexes the fingers and wrist

Back 8

Flexor (DIGITORUM GROUP)

Front 9

located on the posterior surface (knuckle side) of forearm
**mostly extends the fingers and wrist

Back 9

EXTENSOR (DIGITORUM GROUP)

Front 10

Anterior to the thigh, extend (straighten) the lower leg

Back 10

QUADRICEPS FEMORIS GROUP

Front 11

Slender, straight muslce in the center of the anterior thigh
**flex the thigh(raising the knee)

Back 11

RECTUS FEMORIS (2)

Front 12

broad, wide muscle lateral to the rectus femoris
EXTENDS LOWER LEG

Back 12

VASTUS LATERALIS (2)

Front 13

broader or wider than rectus femoris muscle medial th the rectus femoris

**extends lower leg

Back 13

VASTUS MEDIALIS (2)

Front 14

NOT EASILY SEEN, directly behind the rectus femoris, intermediate or in between the other two vastus muscles,

EXTENDS LOWER LEG

Back 14

VASTUS INTERMEDIALIS

Front 15

hamstrings muscle that buldges slightly on the lateral posterior thigh

FLEXES lower leg

Back 15

BICEPS FEMORIS (2)

Front 16

CENTRAL MUSCLE OF HAMSTRINGS, wrapped close to the following muscle by connective tissue

FLEXES lower leg

Back 16

SEMITENDINOSUS (2)

Front 17

most medial of three hamstrings, wrapped close to the semitendinosus muscle by connective tissue

FLEXES lower leg

Back 17

SEMIMEMBRANOSUS

Front 18

attached to inner pelvis and femur

adducts the thigh with the other members of the ADDUCTOR group, has other minor actions such as lateral rotation of thigh

Back 18

ADDUCTOR LONGUS (2)

Front 19

thin, belt-like muscle runs diagonally across the thigh from near the hip to inside of knee

FLEXES and LATERALLY rotates the thigh

Back 19

SARTORIUS (2)

Front 20

superficial calf muscle of the posterior lower leg..

w. soleus, plantar flexion of the foot

Back 20

GASTROCNEMIUS (2)

Front 21

deeper calf muscle of the posterior lower leg (under the gastrocnemius)

Back 21

SOLEUS (2)

Front 22

anterior muscle of the lower

-- dorsiflexion (standing on heels)

Back 22

TIBALIS ANTERIOR (2)

Front 23

lateral muscle of the lower leg AKA fibularis longus

-- Everts foot

Back 23

PERONEUS LONGUS

Front 24

moves the eye superiorly

Back 24

Superior Rectus (2)

Front 25

moves the eye inferiorly

Back 25

Inferior Rectus (2)

Front 26

moves the eye laterally

Back 26

Lateral Rectus (2)

Front 27

moves the eye medially

Back 27

Medial Rectus (2)

Front 28

runs most ANTERIOR-POSTERIOR, hoos over a "pulley" of connective tissue called TROCHLEA

this muscle moves the eye downward and laterally

Back 28

SUPERIOR OBLIQUE (2)

Front 29

eye muscle runs in the opposite direction of the other five at @ angle.. orginates just inside the lip of the eye socket and attaches to the underside of the eye.

-- moves eye upward and laterally (somewhat)

Back 29

INFERIOR OBLIQUE (2)

Front 30

above the eye, attaches to the inside of the skin of upper eyelid

raises upper lid

Back 30

LEVATOR PALPEBRAE SUPERIORIS (2)