"Slumped shoulders" occur when paralyzed

From: upper nuchal line, external occipital protuberance, nuchal ligament, spinous process of the 7th cervical vertebra and all thoracic spinous processes

Insertion: lateral 1/3 of clavicle, acromion and scapular spine

The largest flat muscle in the body

Starting from: lower six thoracic spinous processes, all lumbar spinous processes, median sacral crest and posterior iliac crest

Insertion: Lesser tuberosity ridge of humerus

Function: Extends, adducts and internally rotates the shoulder joint, and can perform pull-ups

Origin; dorsal surface of sacrum, posterior surface of ilium and spinous process of lumbar vertebrae

Insertion: ribs, vertebrae, mastoid process of temporal bone

Function: The muscles on one side contract to bend the spine to the same side; the muscles on both sides contract at the same time to extend the spine and raise the head.

From: inner 2/3 of the clavicle, in front of the sternum, in front of the 1st to 6th costal cartilages

Insertion: Greater tubercle crest of humerus

Function: When contracting, it makes the shoulder joint adduct and rotate internally, so that the shoulder joint flexes forward; when the upper limb is fixed, it can pull the body upward, complete the pull-up movement together with the latissimus dorsi, and can also lift the ribs to help inhale.

Starting from: 3rd to 5th rib

Insertion: coracoid process of scapula

Function: Pull the scapula forward and downward; when the scapula is fixed, the ribs can be lifted to assist in inhalation

Paralysis produces "winged shoulders"

Starting: On the outside of 8~9 ribs

Insertion: medial edge and lower corner of scapula

effect

Origin: lower edge of upper ribs

Insertion: lower edge of upper rib

Function: Lifting ribs to assist in inhalation

Origin: upper edge of lower ribs

Insertion: lower edge of upper rib

Function: lowering ribs and assisting exhalation

Starting from: outside of the lower eight ribs

Insertion: anterior part of iliac crest, linea alba

From: thoracolumbar fascia, iliac crest, lateral 1/2 of inguinal ligament

Stop: white line

Starting from: inner surface of the lower six pairs of ribs, thoracolumbar fascia, iliac crest, lateral 1/3 of the inguinal ligament

Stop: white line

Starting from: pubic symphysis, pubic crest

Insertion: xiphoid process of sternum, front of 5th to 7th costal cartilage

brachioradialis

pronator teres

flexor carpi radialis

Palmaris longus muscle

flexor carpi ulnaris

flexor longus

flexor digitorum profundus

flexor carpi radialis longus

Extensor carpi radialis brevis

extensor digitorum

extensor digiti minimi

extensor carpi ulnaris

supinator

abductor longus

extensor brevis

extensor longus

extensor index finger

Origin; outer surface of iliac bone and dorsal surface of sacrum

Insertion: lateral condyle of tibia

The longest muscle in the body

Origin: anterior superior iliac spine

Insertion: Medial surface of the upper end of the tibia

Function: Flex the hip joint and knee joint, and internally rotate the flexed knee joint

The largest muscle in the body

Origin: anterior inferior iliac spine, anterior aspect of femoral body, medial and lateral lips of femoral linea

Insertion: tibial tuberosity

Function: Flex hip and knee joints

From: ischial tuberosity, femoral linea

Insertion: Head of fibula

Origin: ischial tubercle

Insertion: Inner side of upper end of tibia

Origin: ischial tubercle

Insertion: behind the medial condyle of the tibia

gastrocnemius

soleus muscle

popliteus muscle

flexor digitorum longus

flexor longus

tibialis posterior