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Rectus Abdominus - origin

Pubic crest

Rectus Abdominus - insertion point

Xiphoid process of sternum & costal cartilage of ribs

Rectus Abdominus - joint action

Trunk flexion & lateral trunk flexion

External Oblique - origin

Outer surface of lower ribs 8-10

External Oblique - Insertion point

Linea alba & Iliac crest

External Oblique - Joint Action

Trunk flexion & twits trunk to opposite side

Internal Oblique - Origin

Iliac crest & Lumbar facia

Internal Oblique - Insertion

Costal cartilage of ribs 8-10 & Xiphoid process & Linea alba

Internal Oblique - Joint action

Trunk flexion & twists trunk to same side

Transverse abdominus - Origin

Iliac crest & lumbar fascia & inguinal ligament & costal cartilages of ribs 6-12

Erector spinae - Origin

Crest of Ilium & lumbar & thoracic vertebrae

Erector spinae - Insertion

Angles of ribs 6-12 & all thoracic, cervical vertebrae & temporal bone

Erector spinae - Joint action

Extension of spine/extension of head

Trapezius - origin

Base of skull & vertebral spines C7-T12

Trapezius - Insertion

Lateral 1/3 of clavicle & Scapular spine & Acromion process

Trapezius - Joint action

- upward & downward rotation of scapula
- retraction of scapula

Rhomboid Major & Minor - Origin

Vertebral spines C7-T5

Rhomboid Major & Minor - Insertion

Medial border of scapula

Rhomboid Major & Minor - Joint action

downward rotation of scapula & elevation

Levator Scapula - Origin

Transverse processes of C1-C4

Levator Scapula - Insertion

superior medial border of scapula

Levator Scapula - Joint action

elevation of scapula

Serratus anterior - Origin

Lateral surface of ribs 1-9

Serratus anterior - insertion

costal surface medial border of scapula

Serratus anterior - joint action

protraction of scapula

Pectoralis Minor - origin

anterior surface of ribs 3-5

Pectoralis Minor - insertion

coracoid process of scapula

Pectoralis Minor - joint action

protraction of scapula & downward rotaion of scapula

Deltoid (anterior) - Origin

Lateral third of clavicle

Deltoid (medial) - Origin

Acromion process of scapula

Deltoid (posterior) - Origin

Scapular spine

Deltoid - Insertion

midpoint of the humerus (deltoid tuberosity)

Deltoid (anterior) - joint action

flexion, horizontal adduction at the shoulder and medial rotation

Deltoid (posterior) - joint action

Extension and lateral rotation at the shoulder

Pectoralis Major - origin

- medial half of clavicle
- sternum
- costal cartilage

Pectoralis Major - Insertion

Lateral lip of bicipital groove on humerus

Pectoralis Major - Joint action

- Flextion and horizontal adduction at shoulder
- Medial rotation at shoulder

Teres Major - Origin

Lateral border of scapula

Teres Major - Insertion

Medial lip of bicipital groove on humerus

Teres Major - joint action

- adduction at shoulder
- medial rotation at shoulder

Latissimus Dorsi (lats) - origin

- posterior ilium
- Sacrum
- Lumbar fascia
- vertebral spines of T7 - T12

Latissimus Dorsi (lats) - Insertion

Floor of bicipital groove; between pectoralis major and teres major

Latissimus Dorsi (lats) - Joint action

- adducts and extends at shoulder
- medial rotation at shoulder

Supraspinatus - origin

supraspinious fossa of scapula

Supraspinatus - Insertion

top of greater tuberosity of humerus

Supraspinatus - joint action

Initiates abduction at shoulder

Infraspinatus - origin

Infraspinous fossa of scapula

Infraspinatus - Insertion

Posterior of greater tuberosity of humerus

Infraspinatus - joint action

- lateral rotation at shoulder
- horizontal abduction at shoulder

Teres Minor - origin

Dorsum (back) of scapula on lateral border

Teres Minor - Insertion

Lower posterior greater tuberosity of humerus

Teres Minor - Joint action

- Lateral rotaion at shoulder
- weak extension and adduction at shoulder

Subscapularis - Origin

suscapular fossa of scapula

Subscapularis - Insertion

Lesser tuberosity of humerus

Subscapularis - Joint action

- Medial rotation at shoulder
- Weak extension at shoulder

Biceps Brachii (short head) - Origin

Coracoid process

Biceps Brachii (long head) - Origin

Supraglenoid fossa

Biceps Brachii - Insertion

Tuberosity of radius

Biceps Brachii - Joint Action

- Elbow flexion
- slight flexion at shoulder

Brachioradialis - Origin

Later supracondylar ridge of humerus

Brachioradialis - Insertion

Styloid process of radius

Brachiradialis - Joint action

- Elbow flexion
- Semipronation & semisupination of hand

Triceps Brachii (long head) - origin

lower edge of glenoid cavity of scapula

Triceps Brachii (medial head) - origin

Posterior surface of humerus

Triceps Brachii (lateral head) - origin

Lateral posterior surface of humerus

Extensor Carpi Radialis Longus - Origin

Lateral supracondylar ridge of the humerus

Extensor Carpi Radialis Longus - insertion

Posterior aspect of the second metacarpal

Extensor Carpi Radilis Longus - joint action

Extends and abducts the wrist

Extensor Carpi Radialis Brevis - origin

Lateral epicondyle of the humerus

Extensor Carpi Radialis Brevis - insertion

Posterior aspect of the third metacarpal

Extensor Carpi Radialis Brevis - joint action

Extends the wrist

Extensor Carpi Ulnaris - Origin

Lateral epicondyle of the humerus

Extensor Carpi Ulnaris - insertion

base of the fifth metacarpal

Extensor Carpi Ulnaris - joint action

Extends and adducts the wrist

Superficial Layer Flexor Carpi Radialis - Origin

Medial epicondyle of the humerus

Superficial layer flexor carpi radialis - insertion

surface of the second and third metacarpals

Superficial layer flexor carpi radialis - joint action

Flexion and abduction of the wrist

Second layer Palmaris Longus - origin

Medial epicondyle of the humerus

Second layer Palmaris Longus - Insertion

Palmar aponeurosis

Second layer Palmaris Longus - joint action

Flexes the wrist

Flexor Carpi Ulnaris - origin

Medial epicondyle of the humerus, olecranon process and the proximal two thirds of the posterior surface of the ulna.

Flexor Carpi Ulnaris - Insertion

Pisiform, hamate and fifth metacarpal

Flexor Carpi Ulnaris - joint action

Flexes the wrist and adducts the wrist.

Sartorius - origin

Anterior, superior iliac spine

Sartorius - insertion

Anterior , medial condyle of tibia

Sartorius - joint action

- Hip flexion (weak)
- Lateral rotation at hip
- Knee flexion

Rectus Femoris - Origin

anterior, inferior iliac spine

Rectus Femoris - insertion

Tibial tuberosity by way of the patellar tendon

Rectus Femoris - joint action

- Hip flexion
- Knee extension

Vastus lateralis - origin

upper anterior femur

Vastus lateralis - insertion

tibial tuberosity by way of the patellar tendon

Vastus lateralis - joint action

knee extension

Vastus Intermedius - origin

upper anterior femur

Vastus intermedius - insertion

Tibial tuberosity by way of the patellar tendon

Vastus Intermedius - joint action

knee extension

Gluteus Maximus - origin

- Posterior ilium
- Sacrum
- Lumbar fascia

Gluteus Maximus - insertion

Gluteal line of femur and the iliotibial tract

Gluteus Maximus - joint action

Hip extension and lateral rotation

Gluteus Medius - origin

Lateral surface of the ilium

Gluteus Medius - insertion

Greater trochanter of femur

Gluteus Medius - joint action

Hip abduction of thigh & stabilize pelvis on femur

Gluteus minimus - origin

Lateral surface of ilium (deep to gluteus medius)

Gluteus minimus - insertion

Greater torchanter of the femur

Gluteus minimus - joint action

Hip abduction of thigh & stabilize pelvis on femur

Tensor fasciae latae - origin

Anterior iliac fossa (below crest)

Tensor fasciae latae - insertion

tibia by way of iliotibial tract

Tensor fasciae latae - joint action

hip abduction and flexion

Gracilis - origin

Pubis symphsis

Gracilis - insertion

medial surface of tibia

Gracilis - joint action

Adduction of femur & flexion of knee

Tibialis Anterior - origin

Lateral condyle of tibia

Tibialis Anterior - insertion

- Taral (first cuneiform)
- Base of 1st metatarsal

Tibialis Anterior - joint action

- Dorsi flexion
- Inversion of the foot
(toe taps, running, plantar flexion)

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