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Muscle names, insertion & joint action

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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)