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SHHS PDHPE 11 muscle
Major Muscles
Question | Answer |
---|---|
Deltoid | Origin: scapula, clavicle Insertion: humerus Action: abduction of arm |
Biceps brachii | Origin: humerus, scapula Insertion: radius Action: flexion of forearm and arm, supination of arm |
Triceps | Origin: scapula, humerus Insertion: ulna (proximal end) Action: extension of forearm and arm |
Latissimus dorsi | Origin: spine T6-L5, iliac crest Insertion: humerus (proximal end) Action: adduction, extension and rotation of arm |
Trapezius | Origin: base of skull C7-T5 vertabrae Insertion: scapula (upper surface), clavicle Action:adduction of scapula, elevation of shoulders |
Pectorals | Origin: sternum, clavicle Insertion: head of humerus Action: flexion and adduction of arm |
Erector spinae (sacrospinalis) | Origin: base of skull Insertion:sacrum Action: extension of back |
Gluteus maximus | Origin: posterior surface of pelvis, sacrum Insertion: femur Action: extension and abduction of thigh |
Rectus abdominus | Origin: crest of pubis Insertion: ribs 5,6, 7 Action: flexion of trunk |
External obliques | Origin: lower 8 ribs Insertion: iliac crest Action:flexion and rotation of trunk |
Hamstrings | Origin: Insertion: tibia, head of fibula, Action: extension of thigh flexion of lower leg |
Quadriceps | Origin: iliac crest, femur Insertion: tibia (proximal end) Action: flexion of hip, extension of lower leg |
Gastrocnemius | Origin: femur (distal end) Insertion: heel bone (posterior) Action: knee flexion, plantar flexion of foot |
Soleus | Origin: tibia and fibula Insertion: heel bone (posterior) Action: plantar flexion of foot |
Tibialis anterior | Origin: tibia Insertion: ankle, tarsal, metatarsal Action: dorsiflexion and inversion of foot |