APPENDICULAR SKELETAL MUSCLES PECTORAL GIRDLE shoulder elevate depression retract protract shoulders Multiple muscles of head neck back chest and brachium either originate or insert in the clavicle scapula BRACHIUM upper arm Muscle Action 1 Deltoid prime mover of arm abduction adduction NO specific muscle that adducts arm 1 gravity 2 pectoralis major 3 latissimus dorsi 2 Biceps brachii 3 Triceps brachii flexor primary mover extensor antagonistic ANTEBRACHIUM lower arm or forearm Muscle 1 brachioradialis hum rad Action synergists to biceps 2 anconeus distal hum superior ulna over elbow joint synergist to triceps 3 pronator teres hum rad over elbow pronation pronator quadratus dist rad to dist ulna 4 suppinator hum rad supination 1 APPENDICULAR SKELETAL MUSCLES PELVIC GIRDLE Coxal bone Muscle 1 Iliosoas 2 Gluteus maximus ACTION flexion picking knee up extensor standing up straight FEMORAL REGION Thigh 3 Compartments for thigh separated by fascia dense conn tissue Posterior Medial Anterior compartments Muscle Action 1 Tensor Fascia Lata abducts hip leg out Iliotibial band IT Band DCT NOT in 1 of compartments on lateral side of leg Medial Compartment groin muscles 2 Adductor magnus 3 Adductor longus 4 Adductor brevis 5 Pectineus 6 Gracilis 2 5 adduction of hip Antagonistic to Tensor Fascia Lata GROIN PULLS weak adductor of hip weak knee flexor crosses 2 joints hip knee 2 Posterior Compartment hamstrings Muscle 7 Hamstings a semimembranosus coxal tibia b semitendinosus c biceps femoris Action all 3 are extensors of hip flexors of knee Anterior Compartment quadriceps Muscle 8 Quadriceps femoris a vastus lateralis b vastus intermedius c vastus medialis d rectus femoris Action crosses 2 joints hip knee 9 Sartorius longest muscle in body flexes abducts laterally rotates thigh flexes knee cross legged position All are flexors of hip extensors of knee Antagonistic groups hamstrings quads TFL groin muscles Sartorius 3 CRURAL REGION lower leg Muscle Action 1 gastrocnemius posterior calf plantar flexion of foot Achilles tendon attaches gastrocnemius to calcaneus heel bone 2 tibialis anterior dorsiflexion of foot 4
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