Medial Thigh

3 Muscles make up this compartment.


ADDUCTOR LONGUS: flex and adduct the thigh

ADDUCTOR MAGNUS: flex and adduct the thigh

GRACLIS: flex and adduct the thigh

All aid to flex and adduct the thigh! Go figure! ha

Anterior Thigh

Quadriceps: Main action, powerful knee extensors, used for climbing, running and jumping.

4 (Quad) Heads:

>>> RECTUS FEMORIS - extends knee and flexes thigh at hip

>>> VASTUS LATERALIS - extends & stabilizes knee

>>> VASTUS MEDIALIS - extends knee supports patella

>>> VASTUS INTERMEDIUS - extends knee (is hiding behind the rectus femoris)

Gluteus Medius

Covered by Gluteus Maximus.

Action: Abducts and medially rotates the thigh

Gluteus Maximus

Positioned on the posterior aspect of the hip.


Action: Major Extensor of the thigh.

Iliopsoas

(Li-e-o-so-us) how to pronounce it

Consists of iliacus and psoas major.

Iliopsoas is the PRIME MOVER of flexing the thigh. Or flexing the trunk, when bowing. Also plays role in posture.

Pectineus

Hip anterior muscle.

External anal sphincter

allows the voluntary contraction of defecation

Levator Ani (Pelvis Diaphragm)

Supports and maintains position of plevis.

Resists downward thrusts during coughing, vomiting.

Forms sphincters at anorectal and vaginal juncitons.

Lifts Anal canal during defecation.

Rectus Abdominus

Medial superficial abdominal pair, segmented by 3 tendinous intersections.

Action: Flew and rotate lumbar region

Transverse Abdominis

Deepest of the abdominal wall. The muscle fibre runs in horizontal (transverse) direction.

Action: To compress the abdominal contents.

Internal Oblique

Action: Flexing vertebral column and compressing abdominal wall. Aids muscles in the back to rotate and laterally flex the trunk.

External Oblique

Superficial lateral muscle found in the abdominal wall.

Action: Flexing vertebral column and compressing abdominal wall. Aids muscles in the back to rotate and laterally flex the trunk.

External Intercostal

Again, 11 pairs between ribs that run obliquely (downwards) fro each rib to the next.

Action: Pulls the rib cages up to aid in inspiration. Synergist of the Diaphragm.

Internal Intercostal

11 pairs lie between ribs and run deep to and at right angles of the external intercostals.

Action: Depress ribcage, aid in forced expiration by drawing ribs together

Diaphragm

Forms a floor for the thoracic cavity, when relaxed is a dome shape.

Action: Prime mover of inspiration , flattens on contraction.

Triceps brachii

Location: Posterior compartment of the upper arm.

Action: PRIME MOVER of forearm extension.

Brachioradialis

Location: Lateral forearm, extends from distal humerus, to distal radius.

Action: Flexion and extension of forearm at the elbow.

Biceps Brachii

Two headed muscle found in the anterior part of the upper arm.

Action: Flexes elbow joint, and supinates the forearm (both motions are performed at the same time). Weak flexor of arm at the shoulder











I am going to start doing these in the afternoon, I don't function enough at 4.30am! ARGH :)

Subscapularis

Location: Forms part of the posterior wall of the axilla. A rotator cuff muscle

Action: Rotator of humerus, helps to hold the head of the humerus in the glenoid cavity

Teres Minor

Location: Lines inferior to the intraspinatus; small enlongated muscle.

Action: Same as infraspinatus; adducts arm