Muscle Names Intro to Muscles

Muscle Names Direction of fascicles relative to midline rectus = parallel Rectus abdominis transverse = perpendicular Transvers abdominis oblique = at 45o angle External Oblique Location (i.e. the bone or body part that a muscle covers frontal bone Frontalis tibia Tibialis Anterior

Muscle Names cont. Relative Size maximus = largest Gluteus maximus longus = longest Palmaris longus brevis = shortest Peroneus brevis Number of Origins (Heads) biceps = 2 origins Biceps brachii triceps = 3 origins Triceps brachii

Muscle Names cont. Shape deltoid = triangle Deltoid trapezius = trapezoid Trapezius serratus = saw-toothed Serratus anterior orbicularis = circular Orbicularis oris

Muscle Names cont. Location of Origin and/or Insertion origin = sternum Sternocleidomastoid insertion = mastoid process Action of Muscle flexion Flexor carpi radialis extension Extensor digitorum adduction Adductor longus