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

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A

inferior ribs

Q

Insertion of External intercostals

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A

Superior rib below

Q

Action of External Intercostals

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A

elevate ribs, inspiration

Q

Origin of Internal Intercostals

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A

Superior ribs

Q

Insertion of Internal Intercostals

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A

Inferior border of next rib

Q

Action of Internal Intercostal

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A

Depress rib, exhalation

Origin of Rectus Abdominus

- Pubic Crest - Pubic Symphysis

Insertion of Rectus Abdominus

- Cartilage of ribs 5-7 - Xiphoid process

Action of Rectus Abdominus

flex vertebral column

Action of External Oblique

tense abdominal wall

Action of Internal Oblique

tense abdominal wall

Action of Transverse Abdominus

compress abdomen

Origin of Rhomboideus Minor

C7-T1

Insertion of Rhomboideus Minor

spine of scapula

Action of Rhomboideus Minor

retracts scapula

Origin of Rhomboideus Major

T2-T5

Insertion of Rhomboideus Major

medial border of scapula

Action of Rhomboideus Major

retracts scapula

Action of Masseter

close lower jaw, clench teeth

Action of Occipitalis

tense and retract jaw

Action of Frontalis

Raise eyebrows, wrinkle forehead

Action of Platysma

tense skin of neck, depress mandible

Action of Mentalis

elevate and protrude lower lip

Action of Obicularis Oris

close and purse lips

Action of Obicularis Oculi

close eyes

Action of Temporalis

Close jaw

Action of Procerus

Wrinkle skin between eyes

Action of Nasalis

Elevates corner of nostril

Action of Temporoparietalis

tenses scalp, moves ear