1. Elevation of the mandible 2. Retraction of the mandible

- External occipital protuberance - Medial portion of superior nuchal line - Ligamentum nuchae - SPs C7-T12

- Lateral 1/3 of clavicle - Acromion - Spine of scapula

Axial Flashcards by Art Kostonyan

Temporalis: Origin

Temporal fossa

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Temporalis: Insertion

Coronoid process

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Temporalis: Action

Elevation of the mandible
Retraction of the mandible

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Sternocleidomastoid (SCM): Origin

Top of manubrium
Medial 1/3 of the clavicle

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Sternocleidomastoid (SCM): Insertion

Mastoid process
Lateral portion of superior nuchal line

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Sternocleidomastoid (SCM): Action

Lateral flexion of head & neck to the same side
Rotation of head & neck to the opposite side
BL: flexion of the neck

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Trapezius: Origin

External occipital protuberance
Medial portion of superior nuchal line
Ligamentum nuchae
SPs C7-T12

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Trapezius: Insertion

Lateral 1/3 of clavicle
Acromion
Spine of scapula

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Trapezius: Action

Upper:
- Elevate scapula

Middle:
- Retract scapula

Lower:
- Depress scapula

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Posterior Scalene: Origin

TVPs C6-7

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Posterior Scalene: Insertion

Second rib

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Posterior Scalene: Action

- Elevates ribs during forced inhalation
- Rotate neck to the same side
- Laterally flex neck to the same side

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Erector Spinae Group (ESG): Origin

Thoracolumbar aponeurosis

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Erector Spinae Group (ESG): Insertion

SPs and TVPs of throracic & cervical vertebrae
Various posterior ribs
Mastoid process

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Erector Spinae Group (ESG): Action

Lateral flexion to the same side
BL: extend vertebral column

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Rectus Abdominis: Origin

Pubic crest
Pubic symphysis

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Rectus Abdominis: Insertion

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Cartilage of ribs 5, 6, 7
Xiphoid process

Rectus Abdominis: Action

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Flex trunk
Tilt pelvis posteriorly

Masseter: Origin

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Zygomatic arch

Masseter: Insertion

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Angle and ramus of the mandible

Masseter: Action

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Elevation of the mandible
Protraction of the mandible

Suboccipitals: Origin

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SP C2
TVP C1

Suboccipitals: Insertion

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Inferior nuchal line

Suboccipitals: Action

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Rock & tilt head into extension
Rotation to the same side
Lateral flexion to the same side

Anterior Scalene: Action

**- Elevates ribs during forced inhalation** - Rotate neck to the opposite side - Laterally flex neck to the same side

Anterior Scalene: Origin

TVPs C3-6

Anterior Scalene: Insertion

First rib

Middle Scalene: Action

**- Elevates ribs during forced inhalation** - Rotate neck to the opposite side - Laterally flex neck to the same side

Middle Scalene: Origin

TVPs C2-7

Middle Scalene: Insertion

First rib

Quadratus Lumborum (QL): Origin

Posterior iliac crest

Quadratus Lumborum (QL): Insertion

- Last/12th rib - TVPs L1-4

Quadratus Lumborum (QL): Action

- Laterally tilt (elevate) pelvis - Lateral flexion of the trunk to the same side

Splenius Capitis: Origin

- Inferior 1/2 of ligamentum nuchae - SPs C7-T4

Splenius Capitis: Insertion

- Mastoid process - Lateral portion of superior nuchal line

Splenius Capitis: Action

- Lateral flexion of head & neck to the same side - Rotation of head & neck to the same side - BL: extension of head & neck

Levator Scapula: Origin

TVPs C1-4

Levator Scapula: Insertion

Medial border of scapula between the superior angle and spine

Levator Scapula: Action

- Elevate scapula - Laterally flex head & neck to the same side

External Oblique: Origin

External surfaces of ribs 5-12

External Oblique: Insertion

- Anterior iliac crest - Abdominal aponeurosis (rectus sheath) to linea alba

External Oblique: Action

- Lateral flexion of the trunk to the same side - Rotation of the trunk to the opposite side

Axial Flashcards

(42 cards)