Muscle Origins/Insertions/Actions Flashcards by Matt Ciarrocca | Brainscape

Q

SCM Origin

A

Sternal head: Anterior manubrium
Clavicular head: Superior medial 1/3 of clavicle

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Q

SCM Insertion

A

Lateral mastoid process
Superior nuchal line (lateral 1/2)

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Q

SCM Actions

A

Ipsilateral head/neck side bending (unilateral)
Contralateral rotation (unilateral)
Flexion (bilateral)

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Q

Rectus Capitis Posterior Major Origin

A

SP of C2

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Q

Rectus Capitis Posterior Major Insertion

A

Occiput

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Q

Rectus Capitis Posterior Major Action

A

Head extension

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Q

Rectus Capitis Posterior Minor Origin

A

C1 (posterior tubercle)

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Q

Rectus Capitis Posterior Minor Insertion

A

Occiput

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Q

Rectus Capitis Posterior Minor Action

A

Head extension

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Q

Obliquus Capitis Superior Origin

A

TPs of C1

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Q

Obliquus Capitis Superior Insertion

A

Occiput

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Q

Obliquus Capitis Superior Action

A

Head extension

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Q

Obliquus Capitis Inferior Origin

A

SPs of C2

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Q

Obliquus Capitis Inferior Insertion

A

TPs of C1

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Q

Obliquus Capitis Inferior Actions

A

Head extension

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Q

Splenius Capitis Origin

A

Ligamentum nuchae C3-C7
SP of C7-T4

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Q

Splenius Capitis Insertion

A

Mastoid
Occiput

Q

Splenius Capitis Action

A

Head extension

Q

Splenius Cervicis Origin

A

SPs of T3-T6

Q

Splenius Cervicis Insertion

A

TPs of C1-C3

Q

Splenius Cervicis Action

A

Neck extension

Q

Anterior Scalene Origin

A

TPs of C3-C6

Q

Anterior Scalene Insertion

A

Rib 1

Q

Anterior Scalene Action

A

Cervical flexion

Q

Medial Scalene Origin

A

TPs of C2-C7

Q

Medial Scalene Insertion

A

Rib 1

Q

Medial Scalene Action

A

Cervical flexion

Q

Posterior Scalene Origin

A

TPs of C4 to C6

Q

Posterior Scalene Insertion

A

Rib 2

Q

Posterior Scalene Actions

A

Cervical flexion

Q

Trapezius Origin

A

Medial 1/3 sup. nuchal line
EOP
Ligamentum nuchae
SP of C7-T12

Q

Trapezius Insertion

A

Lateral 1/3 of clavicle
Acromion process
Spine of scapula

Q

Trapezius Actions

A

Upper: Elevates scapula
Middle: Retracts scapula
Lower: Depresses scapula

Q

Latissimus Dorsi Origin

A

SPs of T6-T12
Thoracolumbar fascia
Iliac crest
Inferior 3-4 ribs

Q

Latissimus Dorsi Insertion

A

Intertubercular groove of humerus

Q

Latissimus Dorsi Actions

A

Extends, addicts, and medial rotation of the arm

Q

Rhomboid major origin

A

SPs of T2-T5

Q

Rhomboid major insertion

A

Medial scapula

Q

Rhomboid major action

A

Scapular retraction

Q

Rhomboid minor origin

A

Ligamentum nuchae
SPs of C7-T1

Q

Rhomboid minor insertion

A

Medial scapula

Q

Rhomboid minor action

A

Scapular retraction