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Muscles Origin Insertion Action
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Gravity
Terms in this set (60)
Erector Spinae
Origin:iliac crest
Insertion:mastoid process on skull
Action:intervertebral extension
Splenius
Origin:superior thoracic vertebrae
Insertion:occipital bone
Action:rotate head
Trapezius
Origin:posterior surface of occipital bone
Insertion:spine of scapula
Action:scapular elevation
Rhomboid major and minor
Origin:spinous processes of vertebrae T2-T5
Insertion:medial border of scapula
Action:scapular elevatoin
Levator scapulae
Origin:transverse processes of vertebrae C1-C4
Insertion:medial border of scapula near superior angle
Action:scapular elevation
Serratus anterior
Origin:external surfaces of ribs 1-8
Insertion:medial border of scapula
Action:elevates ribs
Pectoralis minor
Origin:external surfaces of ribs 3-5
Insertion:coracoid process of scapula
Action:elevates ribs
Deltoid
Origin:spine of scapula
Insertion:deltoid tuberosity of humerus
Action:arm abduction
Supraspinatus
Origin:supraspinous fossa of scapula
Insertion:greater tubercle of humerus
Action:arm abduction
Infraspinatus
Origin:infraspinous fossa of scapula
Insertion:greater tubercle of humerus
Action:arm lateral rotation
Teres minor
Origin:lateral border of scapula
Insertion:greater tubercle of humerus
Action:arm extension
Teres major
Origin:near inferior angle of scapula
Insertion:intertubercular groove
Action:arm extension
Latissimus dorsi
Origin:iliac crest
Insertion:intertubercular groove of humerus
Action:arm extension
Subscapularis
Origin:subscapular fossa of scapula
Insertion:lesser tubercle of humerus
Action:arm adduction
Pectoralis major
Origin:sternum
Insertion:intertubercular groove on humerus
Action:shoulder adduction
Biceps brachii
Origin:coracoid process of scapula
Insertion:radial tuberosity of radius
Action:arm flexion
Coracobrachialis
Origin:coracoid process of scapula
Insertion:medial surface of humerus
Action:arm flexion
Brachialis
Origin:anterior surface of humerus
Insertion:coronoid process of ulna
Action:forearm flexion
Triceps brachii
Origin:posterior surface of humerus
Insertion:olecranon process of ulna
Action:arm extension
Flexor carpi radialis
Origin:medial epicondyle of humerus
Insertion:base of metacarpal of the second digit
Action:hand flexion
Flexor carpi ulnaris
Origin:medial epicondyle of humerus
Insertion:medial carpal bones
Action:hand flexion
Pronator quadratus
Origin:anterior surface of distal ulna
Insertion:anterior surface of distal radius
Action:forearm pronation
Brachioradialis
Origin:lateral supracondylar ridge of humerus
Insertion:lateral surface of distal radius
Action:forearm flexion
Gluteus maximus
Origin:lateral surface of ilium
Insertion:gluteal tuberosity of femur
Action:thigh extension
Gluteus medius
Origin:lateral surface of ilium
Insertion:greater trochanter of femur
Action:though abduction
Iliopsoas
Origin:iliac fossa
Insertion:lesser trochanter of femur
Action:thigh flexion
Tensor fasciae latae
Origin:anterior superior iliac spine of ilium
Insertion:iliotibial tract
Action:thigh flexion
Rectus femoris
Origin:anterior inferior iliac spine of ilium
Insertion:tibial tuberosity
Action:thigh flexion
Vastus lateralis
Origin:greater trochanter of femur
Insertion:tibial tuberosity
Action:leg extension
Vastus medialis
Origin:linea aspera
Insertion:tibial tuberosity
Action:leg extension
Vastus intermedius
Origin:anterior and lateral surfaces of femoral shaft
Insertion:tibial tuberosity
Action:leg extension
Sartorius
Origin:anterior superior iliac spine of ilium
Insertion:medial surface of tibia
Action:thigh flexion
Adductor longus
Origin:body of pubis
Insertion:linea aspera of femur
Action:thigh flexion
Gracilis
Origin:body of pubis
Insertion:medial surface of tibia
Action:leg flexion
Pectineus
Origin:superior ramus of pubis
Insertion:pectineal line of femur
Action:thigh flexion
Biceps femoris
Origin:ischial tuberosity of ischium
Insertion:lateral side of head of fibula
Action:thigh extension
Semimembranosus
Origin:ischial tuberosity of ischium
Insertion:medial condyle of tibia
Action:thigh extension
Semitendinosus
Origin:ischial tuberosity of ischium
Insertion:medial surface of tibia
Action:thigh extension
Tibialis anterior
Origin: Interosseous membrane
Insertion: first metatarsal
Action:dorsiflexion
Extensor digitorum longus
Origin: interosseous membrane
Insertion: distal phalanges of digits 2-5
Action:dorsiflexion
Peroneus (fibularis) longus
Origin:head of fibula
Insertion:first metatarsal
Action:plantar flexion
Gastrocnemius
Origin:lateral condyle of femur
Insertion:calcaneus by achilles tendon
Action:leg flexion
Soleus
Origin:head of fibula
Insertion:calcaneus by achilles tendon
Action:plantar flexion
Internal intercostals
Origin:superior border of inferior rib
Insertion:inferior border of superior rib
Action:depresses ribs during expiration
Rectus abdominis
Origin:pubic symphysis
Insertion:xiphoid process
Action:forced expiration
External abdominal oblique
Origin:external surfaces of interior eight ribs
Insertion:pubic crest
Action:forced expiration
Internal abdominal oblique
Origin:iliac crest
Insertion:pubic crest
Action: trunk rotation
Transversus abdominis
Origin:iliac crest
Insertion:pubic crest
Action:compress abdomen
Orbicularis oculi
Origin:medial aspect of bony orbit
Insertion:skin around eyelids
Action:close eye
Orbicularis oris
Origin:mandible
Insertion:lips
Action:speech
Buccinator
Origin:mandible
Insertion:blends with fibers of orbicularis oris
Action:blowing
Zygomaticus major
Origin:zygomatic bone
Insertion:angle of mouth
Action:smile
Temporalis
Origin:temporal bone
Insertion:coronoid process of mandible
Action:retract mandible
Frontalis (Epicranius- frontal belly)
Origin:epicranial aponeurosis
Insertion:skin of eyebrow
Action:raise eyebrows
Masseter
Origin:zygomatic arch
Insertion:lateral surface of mandibular ramus
Action:protrude mandible
Sternohyoid
Origin:manubrium
Insertion:hyoid bone
Action:depress hyoid during swallowing
Stylohyoid
Origin:styloid process
Insertion:hyoid bone
Action:retracts hyoid
Sternocleidomastoid
Origin:manubrium
Insertion:mastoid process
Action:flex neck
Digastric
Origin:posterior belly from mastoid process
Insertion:hyoid bone
Action:elevate hyoid
Mylohyoid
Origin:inferior margin of mandible at the chin
Insertion:hyoid bone
Action:elevate hyoid during swallowing
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