What is the function of each muscle

  Main trunk muscles
  1.Anterior cervical flexion active muscle: sternocleidomastoid muscle
        2.Posterior cervical extension active muscle: trapezius muscle, cervical erector spinae muscle
  3.Torso forward flexion active muscle: rectus abdominis muscle
  4.Posterior trunk extension active muscle: erector spinae, lumbar square muscle
  5.Torso rotation active muscle: external abdominal oblique muscle
  6.Superior pelvic active muscle: lumbar square muscle
  The main muscles of the upper limbs
  (A) Scapula
  1.Scapular abduction and upward rotation of the active muscles: anterior serratus
  2.Superior scapular active muscles: trapezius, scapularis
  3.Internal scapular active muscles: middle trapezius, rhomboid
  (B) Shoulder joint
  1.Active muscles of shoulder flexion: anterior deltoid, brachialis
  2.Posterior extension active muscles of the shoulder joint: latissimus dorsi, teres major, posterior deltoid
  3.Shoulder abduction active muscles: middle deltoid, supraspinatus
  4.Horizontal posterior extension of shoulder joint: posterior deltoid
  5.Horizontal forward flexion of the shoulder joint: pectoralis major
  6.External rotation of the shoulder joint: infraspinatus, teres minor
  7.Internal rotation active muscles of shoulder joint: subscapularis, pectoralis major, latissimus dorsi, teres major
  (C) Elbow joint
  1.Elbow flexion active muscles: biceps brachii, brachialis, brachioradialis
  2.Elbow extension active muscles: triceps brachii
  (D) forearm
  1.Rotary active muscle of forearm: biceps, rotator cervicalis muscle
  2.Forearm rotation front active muscle: rotation front round muscle, rotation front muscle
  (E) wrist joint
  1.Wrist flexion (palmar flexion) active muscles: radial wrist flexor, ulnar wrist flexor
  2.Wrist extension (dorsal extension) active muscles: radial carpal extensors, ulnar carpal extensors, radial carpal short extensors
  3.Foot deviation
  4.Radial deviation
  5.rotation
  (F) hand
  1, metacarpophalangeal joint flexion active muscles: earthworm, metacarpal interosseous muscle, dorsal interosseous muscle
  2.Proximal interphalangeal joint flexion active muscles: superficial finger flexors
  3, finger abduction active muscles: dorsal interosseous muscle, pinky abductor muscle
  4, finger adduction active muscle: palmar interosseous muscle
  5, thumb metacarpophalangeal joint flexion active muscle: thumb short flexor
  6, thumb metacarpophalangeal joint extension active muscle: thumb short extensor
  Main muscles of the lower limbs
  (I.) Hip joint
  1.Active hip flexors: psoas major and iliacus
  2, hip extension active muscles: gluteus maximus, biceps femoris
  3, hip abduction active muscles: gluteus medius
  4.Active hip abductors: adductor pollicis brevis, pubococcygeus, etc.
  5.Active muscles of external rotation of hip joint: internal closed muscle, external closed muscle, gluteus maximus, femoral square muscle, pear-shaped muscle
  6.Internal rotation active muscles of the bone joint: gluteus minimus, vastus medialis tensor fasciae
  (B) Knee joint
  1.Knee flexion active muscles: biceps femoris, semitendinosus, semimembranosus
  2.Knee extension active muscles: quadriceps
  (C) Ankle joint
  1.Active muscles of ankle plantarflexion: gastrocnemius, hallux valgus
  2.Ankle dorsiflexion and internal rotation: tibialis anterior muscle
  3.Foot inversion active muscle: tibialis posterior
  4.External rotation of the foot active muscle: peroneus longus and shortus
  (D) foot
  1.Metatarsophalangeal joint flexion active muscles: bunion short flexor, earthworm muscle
  2, interphalangeal joint flexion active muscle: bunions short flexors, earthworm muscle
  3, metatarsophalangeal joint and interphalangeal joint extension active muscles: the former is the long and short toe extensors, the latter is the long thumb extensors
  The main facial muscles
  (A) Eye muscles
  1.Eyelid muscle: let the patient do the action of closing the eyes tightly
  2, upper eyelid lift muscle; when the eye is turned upward, the upper eyelid is lifted
  3. right superior rectus and right inferior oblique muscles: make the patient’s eye move upward to the right
  4. right superior oblique and left inferior rectus: allows the patient’s eye to move downward to the left
  5.Interior rectus and external rectus: let the patient’s eye move horizontally inside and outside
  (B) Forehead and nasal muscles
  1.Frontal muscles: let the patient make a surprised expression, make the eyebrows lift, and form horizontal wrinkles in the forehead.
  2.Nasal muscles: let the patient open the nostrils wide and then narrow them
  3.Frown muscle: let the patient frown, the eyebrows are pulled to the center and below, and longitudinal wrinkles are formed between the two eyebrows
  (C) mouth muscle
  1.Mouth and lip muscles: tighten the mouth and lips
  2, corner of the mouth muscle: make a sneer expression, one side of the upper edge of the mouth lip lift, but not lift the outer corner of the mouth
  3, upper lip lift and zygomaticus minor muscle: lift and protrude the upper lip
  4.Laughing muscle: let the patient make a smug expression, and pull the corner of the mouth outward after bringing the lips together
  5.Zygomaticus major: let the patient make a smiling expression, and lift the outer corners of the mouth upward and outward
  6.Buccal muscle: let the patient make a whistling expression, shrink the two cheeks, and close the lips
  7, corner of the mouth descending muscle and broad neck muscle: pull down the corner of the mouth with force
  (D) masticatory muscles
  1, temporalis, bite muscle and pterygoid muscle: do clenching action, tightly close the upper and lower jaw
  2, two abdominal muscles, supraglottis muscle group: do open mouth action, pull down the jaw