TRIVIA ON MUSCLES
STERNOCLEIDOMASTOID | Most superficial of the anterior neck muscles |
PECTORALIS MAJOR | Large muscle of the chest |
TRANSVERSE ABDOMINIS | Corset muscle; Innermost layer of the abdominal wall |
DIAPHRAGM | Musculotendinous dome that separates thoracic from abdominal cavity |
LATISSIMUS DORSI | Broadest muscle of the back and lateral thoracic region |
SERRARUS ANTERIOR | Saw muscle; One of the most important muscles of the shoulder girdle (without it, arm cannot be raised overhead) |
TRAPEZIUS | Shawl muscle |
BICEPS BRACHII | Forearm in Supination: Acts in flexion of the elbow both with and without load, in slow and fast movements, and regardless of whether it acts in a concentric or eccentric contraction Forearm in Pronation: May also act with increasing speed and load |
BRACHIORADIALIS | Only muscle that attaches from the distal end of one bone to the distal end of another bone = longest lever arm Only muscle producing flexion of the elbow supplied by radial nerve Pure flexor when forearm is in mid position (drinking beer) Most prominent and largest of the three muscles (Biceps, Brachioradialis, Brachialis) of the radial group of the forearm |
BRACHIALIS | Workhorse of elbow flexion: Always active as an elbow flexor and works in all positions of the forearm |
TRICEPS | Principal extensor of the elbow |
TRICEPS (LATERAL HEAD) | Strongest of the three heads of the triceps brachii |
PRONATOR TERES | Strongest of the three heads of the triceps brachii |
LUMBRICALS | Strongest of the three heads of the triceps brachii |
GLUTEUS MAXIMUS | Largest of the lower extremity muscles; Buttock region |
GLUTEUS MEDIUS | Largest of the lateral hip muscles |
ILIOPSOAS | Most important of the primary hip flexors; Does hip flexion from a sitting position (Hip flexion beyond 90’) |
RECTUS FEMORIS | Only portion of the quadriceps that crosses both hip and knee joints |
SARTORIUS | Superficial, band-like muscle extending obliquely down the thigh from the anterior to the medial side of the thigh |
GRACILIS | The only two-joint adductor |
VASTUS LATERALIS | Largest among the quadriceps muscle group |
POPLITEUS | Most deeply located muscle in the back of the knee; Unlocks the extended knee by medially rotating the tibia on the femur |
EXTENSOR DIGITORUM BREVIS | Only intrinsic muscle on the dorsum of the foot |
TIBIALIS POSTERIOR | Most deeply situated muscle of the calf |
ANTERIOR TIBIALIS | Responsible for the roundness of the shank anteriorly; Primary dorsiflexor of the ankle |