Shared Flashcard Set

Details

Muscle Matching
Muscle -- Origin/Instertion -- Action
30
Anatomy
Undergraduate 3
02/03/2010

Additional Anatomy Flashcards

 


 

Cards

Term
Orbicularis orbit: origin
Definition
medial wall of orbit
Term
Orbicularis orbit: action
Definition
closes eye
Term
orbicularis oris: origin/insertion
Definition


o      Muscle fibers surrounding the opening of mouth

o      Skin at corner of mouth

Term
orbicularis oris: action
Definition


o      Closes and protrudes lips

o      Compresses lips against teeth

o      Shapes lips during speech

Term
Platysma: origin/insertion
Definition

origin: fascia over deltoid and pectoralis major muscles

insertion: mandible, muscles around angle of mouth, skin of lower face

 

Term
platysma: action
Definition
draws out part of lip inferiorly and posteriorly (ie pouting); depresses mandible
Term
occipitalis: origin/insertion
Definition

origin: occipital bone, mastoid process of temporal bone

insertion: epicranial aponeurosis

Term
frontalis: origin/insertion
Definition

origin: epicranial aponeurosis

insertion: skin superior to supraoribtal margin

Term
occipitalis: action
Definition
draws scalp posteriorly
Term
masseter: origin/insertion
Definition

origin: maxilla, zygomatic arch

insertion: angle and ramus of mandible

Term
masseter: action
Definition
elevates mandible, closing mouth and retracts (draws back) mandible
Term

temporalis: origin/insertion

 

Definition

origin: temporal bone

insertion: coronoid process of ramus of mandible

Term
temporalis: action
Definition
elevates and retracts mandible
Term

medial pterygoid: origin/insertion

 

Definition

origin: medial surface of lateral portion of pterygoid process of sphenoid bone; maxilla

insertion: angle of ramus of mandible

Term
medial pterygoid: action
Definition
elevates and protracts mandible and moves mandible from side to side
Term

lateral pterygoid: origin/insertion

 

Definition

origin: greater wing and later surface of lateral ptrerygoid process of sphenoid bone

insertion: condyle of mandible; temporomandibular joint

Term
lateral pterygoid: action
Definition
protracts mandible, depresses mandible as in opening mouth, and moves mandible from side to side
Term

sternocleidomastoid: origin/insertion

 

Definition

origin: sternum and clavicle

insertion: mastoid process of temporal bone

Term
sternocleidomastoid: action
Definition


-  Acting together (bilaterally), flex cervical portion of vertebral column, extend head and elevate sternum during forced inhalation

-   Acting singly (unilaterally), laterally flex and rotate head to side opposite contracting muscle 

Term
splenius capitis: origin/insertion
Definition

origin: ligament nuchae and spinous process of seventh cervical vertebra and first three or four thoracic vertebrae

insertion: occipital bone and mastoid process of temporal bone

Term
splenius capitis: action
Definition
acting together: extending head. Acting singly: rotate head to side opposite contracting muscle.
Term

External Oblique: origin/insertion

 

Definition

origin: inferior eight ribs

insertion: iliac crest of linea alba

Term
external oblique: action
Definition
acting together (bilaterally): compress abdomen and flex vertebral column. Acting singly (unilaterally): laterally flex vertebral column, especially lumbar portion, and rotate vertebral column.
Term

internal oblique: origin/insertion

 

Definition

origin: iliac crest, inguinal ligament, and thoracocolumbar fascia

insertion: cartilage of last three or four ribs and linea alba

Term
internal oblique: action
Definition

Acting together: compress abdomen and flex vertebral column

Acting singly: laterally flex vertebral column, especially lumbar portion, and rotate vertebral column.

Term

Transversus Abdominus: origin/insertion

 

Definition

Origin: iliac crest, inguinal ligament, lumbar fascia, and cartilages of ingerior 6 ribs

Insertion: xyphoid process, linea alba, and pubis

Term
Transversus Abdominus: action
Definition
compresses abdomen
Term

Rectus abdominis: origin/insertion

 

Definition

origin: pubic crest and pubic symphysis

insertion: cartilage of 5th-7th ribs and xiphoid process

 

Term
Rectus abdominis: action
Definition
flexes vertebral column. especially lumbar portion, and compresses abdomen, forced exhalation, and child birth.
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