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Muscle Origins & Insertions
N/A
48
Anatomy
Undergraduate 1
04/10/2009

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Cards

Term
Frontalis
Definition
Elevates eyebrows
Term
Orbicularis Oculi
Definition
Closes eye
Term
Orbicularis Oris
Definition
Closes mouth
Term
Temporalis
Definition

O: temporal bone

I: coronoid process of mandible

A: both - elevate mandible; one - move mandible sideways

Term
Masseter
Definition

O: zygomatic arch

I: ramus & angle of mandible

A: elevates mandible

Term
Buccinator
Definition
Compresses and retracts cheek
Term
Zygomaticus Major/Minor
Definition

O: zygomatic bone

I: angle of mouth, upper lip

A: elevates angle of mouth and upper lip

Term
Sternocleidomastoid
Definition

O: manubrium, medial 1/3 of clavical

I: mastoid process

A: both - flexes head; one - rotates head

Term
Trapezius (Neck)
Definition
Extends and laterally rotates head
Term
External Intercostals
Definition
Expands rib cage
Term
Internal Intercostals
Definition
Compress rib cage
Term
External Abdominal Oblique
Definition

O: ribs (5-12)

I: iliac crest, pubis

A: stabilizes and rotates trunk, compresses organs

Term
Internal Abdominal Oblique
Definition

O: iliac crest

I: ribs, pubis

A: stabilizes and rotates trunk, compresses organs

Term
Rectus Abdominis
Definition

O: pubis

I: xiphoid process, costal cartilages

A: flexes trunk at waist

Term
Erector Spinae
Definition
Extends and laterally flexes vertebral column
Term
Serratus Anterior
Definition

O: ribs

I: medial edge of scapula

A: protracts and laterally rotates scapula

Term
Pectoralis Major
Definition

O: clavicle, sternum, ribs (1-6)

I: greater tubercle of humerus

A: flexes, adducts, and medially rotates arm

Term
Trapezius (Scapula)
Definition
Elevates, depresses, and fixes scapula
Term
Rhomboideus Major/Minor
Definition
Retracts and fixes scapula
Term
Latissimus Dorsi
Definition

O: thoracic/lumbar vertebrae, sacrum, iliac crest

I: lesser tubercle of humerus

A: extends, adducts, and medially rotates arm

Term
Deltoid
Definition

O: acromion and spine of scapula, clavicle

I: deltoid tuberosity of humerus

A: anterior - flexes arm; lateral - abducts arm; posterior - extends arm

Term
Supraspinatus
Definition

(rotator cuff)

O: supraspinous fossa of scapula

I: greater tubercle of humerus

A: abducts arm

Term
Infraspinatus
Definition

(rotator cuff)

O: infraspinous fossa of scapula

I: greater tubercle of humerus

A: laterally rotates arm

Term
Teres Minor
Definition

(rotator cuff)

O: lateral edge of scapula

I: greater tubercle of humerus

A: laterally rotates arm

Term
Subscapularis
Definition

(rotator cuff)

O: subscapular fossa of scapula

I: lesser tubercle of humerus

A: medially rotates arm

Term
Brachialis
Definition

O: distal half of anterior humerus

I: ulnar tuberosity

A: flexes forearm (prime mover)

Term
Biceps Brachii
Definition

O: superglenoid tubercle, coracoid process of scapula

I: radial tuberosity

A: flexes, supinates forearm

Term
Triceps Brachii
Definition

O: inferior glenoid cavity, posterior humerus

I: olecranon process

A: extends forearm

Term
Flexor Carpi Radialis
Definition

O: medial epicondyle of humerus

I: metacarpals II-III

A: flexes, abducts wrist

Term
Flexor Carpi Ulnaris
Definition

O: medial epicondyle of humerus

I: metacarpal V

A: flexes, adducts wrist

Term
Flexor Digitorum Superficialis
Definition

O: medial epicondyle of humerus

I: medial phalanges II-V

A: flexes wrist and fingers

 

Term
Flexor Digitorum Profundus
Definition

O: ulna, coronoid process of ulna

I: distal phalanges II-V

A: flexes wrist and fingers

Term
Extensor Carpi Radialis (brevis & longus)
Definition

O: lateral epicondyle of humerus

I: metacarpals II & III

A: extends, adducts, fixes wrist

Term
Extensor Carpi Ulnaris
Definition

O: lateral epicondyle of humerus

I: metacarpal V

A: extends, adducts, fixes wrist

Term
Extensor Digitorum
Definition

O: lateral epicondyle of humerus

I: phalanges II-V

A: extends wrist and fingers

Term

Iliopsoas

(two muscles)

Definition

iliacus & psoas major

O: iliac crest, lumbar vertebrae

I: lesser trochanter of femur

A: flexes thigh or trunk

Term
Gluteus Maximus
Definition

O: sacrum, ilium

I: gluteal tuberosity of femur

A: extends and abducts thigh

Term
Adductor Magnus, Brevis, and Longus
Definition

O: pubis, anterior ischium

I: linea aspera of femur

A: adducts thigh

 

Term
Biceps Femoris
Definition

O: ischial tuberosity, linea aspera of femur

I: head of fibula

A: extends thigh, flexes leg

Term
Semitendinosus
Definition

O: ischial tuberosity

I: proximal tibia

A: extends thigh, flexes leg

Term
Semimembranosus
Definition

O: ischial tuberosity

I: proximal tibia

A: extends thigh, flexes leg

Term
Sartorius
Definition
Flexes leg and knee, laterally rotates thigh
Term
Quadriceps Femoris: Rectus Femoris, Vastus Lateralis, Vastus Medialis, Vastus Intermedius
Definition

O: anterior inferior spine of ilium (rectus femoris), femur

I: tibial tuberosity

A: flexes thigh, extends leg

Term
Tibialis Anterior
Definition

O: lateral, proximal tibia

I: metatarsal I

A: dorsiflexes and inverts foot

Term
Gastrocnemius
Definition

O: condyles of femur

I: calcaneus

A: plantar flexes foot, flexes knee

Term
Soleus
Definition

O: posterior tibia and fibula

I: calcaneus

A: plantar flexes foot

Term
Extensor Digitorum Longus
Definition

O: lateral condyle of tibia, fibula

I: middle and distal phalanges II-V

A: extends toes, dorsiflexes foot

Term
Flexor Digitorum Longus
Definition

O: posterior of tibia

I: distal phalanges II-V

A: flexes toes

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