| Action | Muscles Involved |
|---|---|
| flexion | anterior deltoid pectoralis major (upper) biceps brachii coracobrachialis |
| extension | posterior deltoid latissimus dorsi teres major triceps brachii (long head) infraspinous teres minor pectoralis major (lower) |
| horizontal abduction | posterior deltoid infraspinous teres minor |
| horizontal adduction | anterior deltoid pectoralis major (upper) |
| abduction | deltoid supraspinous |
| adduction | latissimus dorsi teres major infraspinous teres minor pectoralis major tricep brachii (long head) coracobrachialis |
| lateral rotation / external rotation | posterior deltoid infraspinous teres minor |
| medial rotation / internal rotation | anterior deltoid latissimus dorsi teres major subscapularis pectoralis major |
| Action | Muscles Involved |
|---|---|
| elevation | upper trapezius rhomboid major rhomboid minor levator scapula |
| depression | lower trapezius serratus anterior pectoralis minor |
| adduction / retraction | middle trapezius rhomboid major rhomboid minor |
| abduction / protraction | serratus anterior pectoralis minor |
| upward rotation | upper and lower trapezius |
| downward rotation | rhomboid major rhomboid minor levator scapula |
| Action | Muscles Involved |
|---|---|
| flexion | biceps brachii brachialis brachioradialis pronator teres |
| extension | triceps brachii aconeus |
| Action | Muscles Involved |
|---|---|
| supination | biceps brachii supinator brachioradialis |
| pronation | pronator teres pronator quadratus bracchioradialis |
| Action | Muscles Involved |
|---|---|
| extension | extensor digitorum |
| flexion | flexor digitorum |
| Action | Muscles Involved |
|---|---|
| flexion | rectus abdominis external oblique and internal obliques work bilaterally |
| extension | bilaterally: longissimus, iliocostalis, multifidus, rotatores, intertransversii semispinalis capitis quadratus lumborum interspinalis latissimus dorsi |
| rotation (all muscles work unilaterally) | to opposite side: multifidus, rotatores, external obliques same side:internal oblique |
| lateral flexion (all muscles work unilaterally to the same side) | spinalis longissimus latissimus dorsi iliocostalis quadratus lumborum external oblique internal oblique |
| Action | Muscles Involved |
|---|---|
| elevation / expansion | muscles work bilaterally: scalene (anterior, psoterior, middle), sternocleidomastoid, external intercostals serratus posterior pectoralis major pectoralis minor serratus anterior subclavius |
| depression / collapse | internal intercostals serratus posterior inferior |
| inhalation | diaphragm scalene (anterior, middle, posterior) all work bilaterally sternocleidomastoid external intercostals serratus posterior superior quadratus lumborum pectoralis major pectoralis minor serratus anterior subclavius |
| exhalation | internal costals serratus posterior inferior external oblique internal oblique transverse abdominis quadratus lubmorum |
| Action | Muscles Involved | ||||||
|---|---|---|---|---|---|---|---|
| flexion | bilaterally:sternocleidomastoid anterior scalene longus capitis longus colli | ||||||
| extension | bilaterally:upper trapezius, levator scapuls, splenius capitis, splenius cervicis rectus capitis posterior major se,ispinalis capitis lognissimus capitis longissimus cervicis iliocostalis cervicis rotation (unilaterally to the opposite side)
| upper trapezius | sternocleidomastoid anterior, middle, posterior scalene rotation (unilaterally to the opposite side)
| levator scapula | splenius capitis splenius cervicis rectus capitis posterior major oblique capitis inferior longus colli longus capitis longissimus capitis longissimus cervicis iliocostalis cervicis lateral flexion (unilaterally in the same direction)
| upper trapezius | levator scapula splenius capitis splenius cervicis sternocleidomastoid longus capitis longus colli anterior, middle, posterior scalene longissimus capitis longissimus cervicis iliocostalis cervicis |
| Action | Muscles Involved |
|---|---|
| flexion | rectus femoris gluteus medius (anterior) gluteus minimus adductor magnus adductor longus adductor brevis pectineus tensor fasciae latae sartorius psoas major iliacus |
| extension | biceps femoris semitendinous seimembranosus gluteus maximus gluteus medius adductor magnus |
| medial rotation / internal rotation | semitendinousus gluteus medius gluteus minimus adductor magnus adductor longus adductor brevis gracilis pectineus tensor fasciae latae |
| lateral rotation / external rotation | biceps femoris gluteus maximus gluteus medius sartorius piriformis quadratus femoris obturator internus obturator externus gemelllus superior gemellus inferior psoas major iliacus |
| abduction | gluteus maximus gluteus medius gluteus minimus tensor fasciae latae sartorius piriformis |
| adduction | adductor magnus adductor longus adductor brevis pectineus gracilis psoas major iliacus gluteus maximus |
| Action | Muscles Involved |
|---|---|
| flexion | biceps femoris semitendinosus semimembranosus gracilis sartorius gastrocnemius popliteus plantaris |
| extension | rectus femoris vastus lateralils vastus medialis vastus intermedius |
| memdial rotation of flexed knee | semitendinosus semimembranosus gracilis sartorius popliteus |
| lateral rotation of flexed knee | biceps femoris |
| Action | Muscles Involved | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| plantar flexion | gastrocnemius soleus tibialis posterior peroneus longus peroneus brevis flexor digitorum longus flexor hallucis longus plantaris | ||||||||
| dorsiflexion | tibialis anterior extensor digitorum longus extensor hallucis longus | ||||||||
| inversion | tibialis anterior tibialis posterior flexor digitorum longus flexor hallucis longus extensor hallucis longus | ||||||||
| eversion | Peroneus longus peroneus brevis extensor digitorum longus | ||||||||
| flexion of second-fifth toes | flexor digitorum longus flxor digitorum brevis | ||||||||
| extension of second-fifth toes | extensor digitorum longus Top Pelvis
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