Body muscles

Biceps Position front of upper arm Action Flexes elbow, supinates forearm and hand

Triceps Position Back of arm Action Extends the elbow

Brachio- radialis Position Radial side of the Forearm Action Flexes and supinates forearm

Wrist flexors Position Along forearm Action Flex the wrist

Wrist extensors Position Along forearm Action Extend the wrist

Deltoid Position Over the shoulder Action Abducts the arm

Pectoralis major Position Chest Action Adducts the arms

Splenius capitis Position Back of neck to base of skull under trapezius Action Extension and rotation of head

Splenius cervicis Position Back of neck, beside an below spl.capitis Action Extension and rotation of head

Rotator cuff Position Between scapula and head of humerus Action Rotation of shoulder

Rhomboids Position Between vertebrae and scapula Action Pulls back and lifts scapula

Trapezius Position Upper back Action Rotates the shoulder, retracts scapula

Latissimus dorsi Position Lower back, sides of thorax Action Extends the arm, adducts humerus

Erector spinae Position Either side of vertebrae Action Extends and laterally flexes the spine, maintains posture

Intercostals Position Between the ribs Action Internal intercostals help with expiration External intercostals help with inspiration

Diaphragm Position Between thoracic and abdominal cavity Action Respiratory muscle, increases the volume of the thoracic cavity

Rectus abdominis Position Front of abdomen Action Flexes spine, compresses abdomen

External obliques Position Either side of abdomen Action Lateral flexion, compress abdomen

Serratus anterior Position Side of the rib cage Action Protracts scapula

Piriformis Position Outer hip, between sacrum and head of femur Action Abducts and rotates the hip

Gluteals (gluteus maximus ,medius and minimus ) Position Buttocks Action Extend, abduct and rotate thigh

Hamstrings Position Back of thigh Action Flex the knee and extend the thigh at the hip

Quadriceps Position Front of thigh Action Extends the knee and flexes the thigh

Tensor fascia lata Position Outer thigh Action Abducts the thigh

Sartorius Position Across front of thigh Action Flexes the thigh and the knee

Adductor group Position Inner thigh Action Adduct the thigh

Gracilis Position Inner thigh Action Adduct the thigh

Gastrocnemius Position Calf muscle Action Plantar flex the foot

Soleus Position Beneath gastrocnemius Action Plantar flex the foot

Tibialis anterior Position Front of lower leg, beside shin bone Action Dorsi flex and inverts the foot