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Anterior Muscles
Anterior muscles of the human body
36
Anatomy
Undergraduate 1
03/24/2014

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Cards

Term
[image]
Definition

    Name                        Action             Origin                             

Sternocleidomastoid

*Neck Flexion *Contralateral rotation of head

Clavicular head – sternal end of clavicle.

 

Sternal Head – manubrium.        

 Mastoid Process

CN XI & (C2-C3)

Term
[image]
Definition

  Muscle       Action             origin        insertion   ner

Scalenes

Anterior

Middle, &

Posterior

*Elevates ribs, *Neck flexion & lateral flexion, *Contralateral rotation of head

Transverse and costal processes C2-C7

Superior surface of first 2 ribs

Cervical Spinal Nerves

Term
[image]
Definition

   Muscle           Action        Origin    Insertion  Nerve

Subclavius

*Depression

*Protraction

1st Rib

Clavicle (inferior border)

Long Thoracic Nerve (C5-C7)

Term
[image]
Definition

   Muscle          Action      Origin    Insert       Nerve

Pectoralis Minor

 

*Depresses scapula

Ribs 3-5

Coracoid process

Medial Pectoral nerve (C8, T1)

 

*Protraction

 

 

 

 

*Downward rotation

 

 

 

 

*Elevates ribs

 

 

 

 

 

Term
[image]
Definition

 

   Muscle       Action        Origin        Insert    Nerve

Pectoralis Major

*Flexion of shoulder

Ribs 2-6, Sternum, Infero-medial portion of clavicle

Greater tubercle & lateral lip of bicipital groove

Pectoral nerve (C5-T1)

 

*Adduction of humerus

 

 

 

 

*Internal rotation humerus

 

 

 

Term
[image]
Definition

  Muscle       Action          Origin     Insert       Nerve 

Anterior Deltoid

*Abduction of humerus

Clavicle and scapula

Deltoid tuberosity

Axillary nerve (C5-C6)

 

*Flexion of humerus

 

 

 

 

*Internal rotation of Humerus

 

 

 

Term
[image]
Definition

  Muscle                Action          Origin     Insert      Nerv

Coracobrachialis

*Flexion of shoulder. *Adduction for humerus

Coracoid process

Medial margin of shaft of humerus

Musculocutaneous nerve (C5-C7)

Term
[image]
Definition

  Muscle    Action     Origin          Insert          Nerve

Biceps Brachii (short head)

 

*Flexion at elbow

Coracoid process

Radial tuberosity

Musculocutaneous nerve (C5-C6)

 

Biceps Brachii (long head)

*Flexion at shoulder &  elbow

Supraglenoid tubercle

Radial tuberosity

Musculocutaneous nerve (C5-C6)

Term
[image]
Definition

  Muscle       Action     Origin     Insert        Nerve

Brachialis

 

 

*Flexion at elbow

Anterior & distal portion of humerus

Ulnar tuberosity

Musculocutaneous nerve (C5-C6) & Radial nerve (C7-C-8)

Term
[image]
Definition

 Muscle         Action           Origin      Insert     Nerve

Pronator Quadratus

*Pronates forearm/hand

Antero-medial surface of distal ulna

Antero-lateral surface of distal radius

Median nerve (C-8-T1)

 

Term
[image]
Definition

  Muscle       Action         Origin         Insert      Nerve 

Pronator Teres

*Pronates forearm/hand

*Elbow Flexion

Medial epicondyle of humerus & coronoid process of ulna

Middle of lateral surface of radius

Median nerve (C6-C7)

Term
[image]
Definition

  Muscle    Action       Origin         Insert          Nerve

Flexor carpi radialis

*Flexion of wrist

Medial epicondyle of humerus

Bases of 2nd and 3rd metacarpals

Median nerve (C-6-C7)

 

*Abduction of wrist (Radial deviation)

 

 

 

Term
[image]
Definition

 Muscle     Action        Origin         Insert          Nerve

Flexor carpi ulnaris

*Flexion of wrist *Adduction of wrist (ulnar deviation)

Medial epicondyle of humerus

Pisiform bone, hamate bone and base of 5th metacarpal

Ulnar nerve (C-8 -T1)

Term
[image]
Definition

  Muscle      Action     Origin        Insert           Nerve

Palmaris longus

*Flexion of wrist

Medial epicondyle of humerus

Palmar aponeurosis and flexor retinaculum

Median nerve (C-6-C7)

Term
[image]
Definition

 Muscle          Action      Origin       Insert         Nerve

Flexor digitorum superficialis

*Flexion of digits 2-5

Medial epicondyle of humerus

Mid-portion  of middle phalanges of digits 2-5

Median nerve (C-7-T1)

 

*Wrist Flexion

 

 

 

 

Term
[image]
Definition

  Muscle      Action       Origin          Insert         Nerve 

Flexor digitorum profundus

*Flexion of fingers

*Wrist Flexion

Postero-medial surface of ulna & interosseous membrane

Bases of distal phalanges of digits 2-5

Palmer Interosseous nerve – (C8-T1)

Term
[image]
Definition

 Muscle     Action       Origin           Insert        Nerve

Flexor pollicis longus

*Flexion of thumb

*Flexion of wrist Abduction of wrist

Anterior shaft of radius & interosseous membrane

Base of distal phalanx of thumb

Median nerve (C-8-T1)

Term
[image]
Definition

 Muscle        Action         Origin          Insert         Nerve

Piriformis

*Lateral rotation of hip

Anterolateral surface of the sacrum

Greater trochanter

Sacral nerve (S1-S2)

 

*Abduction of hip

 

 

 

Term
[image]
Definition

 Muscle         Action         Origin     Insert    Nerve 

Adductor brevis

*Adduction of hip

Inferior ramus of pubis

Linea aspera of femur

Obturator nerve (L3-L4)

 

*Flexion of hip

 

 

 

 

 

 

 

 

Term
[image]
Definition

 Muscle         Action        Origin     Insert     Nerve

Adductor longus

*Adduction of hip

Inferior ramus of pubis

Linea aspera of femur

Obturator nerve (L3-L4)

 

*Flexion of hip

 

 

 

Term
[image]
Definition

 Muscle        Action        Origin       Insert       Nerve

Adductor magnus

*Adduction of hip

Inferior ramus of pubis & ischial tuberosity

Linea aspera of femur & adductor tubercle

Obturator nerve & Sciatic nerves

 

Term
[image]
Definition

 Muscle         Action       Origin      Insert        Nerve

Pectineus

*Adduction of hip

Superior ramus of pubis

Pectineal line – which is below the lesser trochanter

Femoral nerve (L2-L4)

 

*Flexion of hip

 

 

 

 

*Internal rotation- femur

 

 

 

Term
[image]
Definition

 Muscle      Action        Origin      Insert     Nerve

Gracilis

*Flexion at the knee & hip

Inferior ramus of pubis

Inferior to medial condyle of tibia

Obturator nerve (L3-L4)

 

*Adduction of hip

 

 

 

 

*Internal rotation - femur

 

 

 

 

Term
[image]
Definition

 Muscle        Action     Origin       Insert         Nerve

Iliopsoas

(Iliacus)&

(Psoas Major)

*Flexion at hip

 

Iiacus - Iliac fossa)

 

Psoas - Transverse processes of (T12-L5)

Lesser trochanter

Iliacus

Femoral nerve (L2-L4)

 

Psoas - Lumbar Plexus (L2-L3) –

Term
[image]
Definition

 Muscle        Action       Origin      Insert      Nerve 

Sartorius

*Flexion at knee

Anterior superior iliac spine (ASIS)

Antero-medial surface of Tibia

Femoral nerve (L2-L4)

 

*Flexion at hip

 

 

 

 

*External rotation - femur

 

 

 

Term
[image]
Definition

 Muscle     Action         Origin     Insert        Nerve

Rectus femoris

*Flexion of hip

Anterior inferior iliac spine (AIIS)

Tibial tuberosity  via quadraceps tendon or patellar ligament or patellar tendon

Femoral nerve (L2-L4)

 

*Extension of knee

 

 

 

Term
[image]
Definition

  Muscle          Action         Origin          Insert    Nerve

Vastus intermedius

*Extension of knee

Anterolateral surface of femur & distal half  linea aspera

As above

Femoral nerve (L2-L4)

Term
[image]
Definition

 Muscle      Action           Origin        Insert    Nerve

Vastus lateralis

*Extension of knee

 Inferior to greater trochanter & proximal half of linea aspera

As above

Femoral nerve (L2-L4)

Term
[image]
Definition

 Muscle      Action         Origin       Insert      Nerve

Vastus medialis obliquus (Internis)

*Knee Ext.

Linea aspera

As above

As above

Term
[image]
Definition

 Muscle      Action           Origin      Insert         Nerve

Tibialis anterior

*Dorsiflexion

Lateral condyle of tibia

Base of 1st metatarsal and middle (2nd) cuneiform

Deep fibular nerve (L4-S1)

 

*Inversion

 

 

 

Term
[image]
Definition

 Muscle       Action          Origin       Insert       Nerve

Extensor digitorum longus

*Toe extension

Lateral condyle of tibia & anterior surface of fibula

Dorsal surfaces of phalanges 2-5

Deep fibular nerve (L4-S1)

 

*Dorsiflexion

 

 

 

 

*Eversion

 

 

 

Term
[image]
Definition

  Muscle       Action           Origin        Insert     Nerve

Extensor hallucis longus

*Hallicus extension

Anterior surface of fibula

Dorsal surface of distal phalanx of great toe

Deep fibular nerve (L4-S1)

 

*Dorsiflexion

 

 

 

 

*Inversion

 

 

 

Term
[image]
Definition

 Muscle        Action              Origin    Insert    Nerve 

Rectus Abdominis

*Lumbar/spinal flexion

*Lateral Flexion of spine both sides

*Posterior pelvis rotation

Crest of pubis

Cartilage of 5-7 ribs and xiphoid process

Intercostal nerves (T7-T12)

Term
[image]
Definition

 Muscle       Action             Origin     Insert             Nerv

External Oblique

* Lumbar/spinal flflexion

*Lateral flexion of spine both sides

*Contralateral rotation of the spine

Borders of lower 8 ribs at side of chest

Apononeroses from linea alba to iliac crest

Intercostal nerves (T5-T12)

Term
[image]
Definition

 Muscle      Action         Origin              Insert      Nerve

Internal Oblique

* Lumbar flexion

*Lateral flexion both sides

*Ipsilateral rotation spine

Thoracolumbar fascia & iliac crest

Costal cartilage of the 8-10th ribs and linea alba

Intercostal nerves (T5-T12)

Term
[image]
Definition

 Muscle          Action       Origin       Insert    Nerve

Transverse Abdominis

*Forces expiration

Inner rim of the iliac crest, and inner surface of the costal cartilages of the lower 6 ribs

Crest of pubis, and linea alba

Intercostal nerves (T5-T12)

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