Muscles of the Head and Torso Flashcards by Jasmine Charlesworth

Q

Origin of Trapezius

A

External Occipital Protuberance
Ligamentum Nuchae
C7-T12

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Q

Insertion of Trapezius

A

Clavicle
Acromion Process
Spine of Scapula

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Q

Action of Trapezius

A

Elevate, retract, depress scapula

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Q

Origin of Latissimus Dorsi

A

T7-T12
Lumbar and sacral vertebrae
Iliac crest

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Q

Insertion of Latissimus Dorsi

A

Intertubercular groove of humerus

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Q

Action of Latissimus Dorsi

A

Extend, adduct, medially rotate arm

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Q

Origin of Sternocleidomastoid

A

Sternum
Clavicle

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Q

Insertion of Sternocleidomastoid

A

mastoid process

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Q

Action of Sternocleidomastoid

A

pull head to one side, flex neck

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Q

Origin of Pectoralis Major

A

Clavicle
Sternum
Costal Cartilage of ribs 2-6

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Q

Insertion of Pectoralis Major

A

Lateral intertubercular groove

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Q

Action of Pectoralis Major

A

Flex, adduct, medially rotate arm

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Q

Origin of Pectoralis Minor

A

Ribs 3-5

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Q

Insertion of Pectoralis Minor

A

Coracoid process

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Q

Action of Pectoralis Minor

A

depress shoulder

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Q

Origin of Serratus Anterior

A

outer upper ribs

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Q

Insertion of Serratus Anterior

A

Anterior Scapula

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Q

Action of Serratus Anterior

A

protract scapula

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Q

Origin of External intercostals

A

inferior ribs

Q

Insertion of External intercostals

A

Superior rib below

Q

Action of External Intercostals

A

elevate ribs, inspiration

Q

Origin of Internal Intercostals

A

Superior ribs

Q

Insertion of Internal Intercostals

A

Inferior border of next rib

Q

Action of Internal Intercostal

A

Depress rib, exhalation

Q

Origin of Rectus Abdominus

A

Pubic Crest
Pubic Symphysis

Q

Insertion of Rectus Abdominus

A

Cartilage of ribs 5-7
Xiphoid process

Q

Action of Rectus Abdominus

A

flex vertebral column

Q

Action of External Oblique

A

tense abdominal wall

Q

Action of Internal Oblique

A

tense abdominal wall

Q

Action of Transverse Abdominus

A

compress abdomen

Q

Origin of Rhomboideus Minor

A

C7-T1

Q

Insertion of Rhomboideus Minor

A

spine of scapula

Q

Action of Rhomboideus Minor

A

retracts scapula

Q

Origin of Rhomboideus Major

A

T2-T5

Q

Insertion of Rhomboideus Major

A

medial border of scapula

Q

Action of Rhomboideus Major

A

retracts scapula

Q

Action of Masseter

A

close lower jaw, clench teeth

Q

Action of Occipitalis

A

tense and retract jaw

Q

Action of Frontalis

A

Raise eyebrows, wrinkle forehead

Q

Action of Platysma

A

tense skin of neck, depress mandible

Q

Action of Mentalis

A

elevate and protrude lower lip

Q

Action of Obicularis Oris

A

close and purse lips

Q

Action of Obicularis Oculi

A

close eyes

Q

Action of Temporalis

A

Close jaw

Q

Action of Procerus

A

Wrinkle skin between eyes

Q

Action of Nasalis

A

Elevates corner of nostril

Q

Action of Temporoparietalis

A

tenses scalp, moves ear