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MSK Exam 1 > Back Myology > Flashcards

Back Myology Flashcards

1
Q

Trapezius M. (Layer 1)

A

Occipital Bone; Ligamentum Nuchae; Spinous Processes C7-T12, Occipital Bone

Lateral 1/3 Clavicle; Acromion; Scapular Spine of Scapula

Retract, Elevate, & Depress the Scapula; Neck Extension (Bilaterally); Neck Lateral Flexion & Rotate Face Away (Unilaterally)

Spinal Accessory N. (CN XI)

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2
Q

Latissimus Dorsi M. (Layer 1)

A

Spinous Processes T6-L5 & Median Sacral Crest; Ribs 9-12; Iliac Crest

Floor of Humeral Intertubercular Groove

Extend, Adduct, & Medially/Internally Rotate Humerus; Rotate Glenoid Cavity Inferiorly

Thoracodorsal N. (C6-8)

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3
Q

Rhomboid Major M. (Layer 2)

A

Spinous Processes T2-T5

Medial Border of Scapula (Inferior to Scapular Spine)

Retract/Elevate Scapula; Rotate Glenoid Cavity Inferiorly

Dorsal Scapular N. (C4,5)

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4
Q

Rhomboid Minor M. (Layer 2)

A

Spinous Processes C7-T1

Medial border of scapula (at scapular spine)

Retract/Elevate Scapula; Rotate Glenoid Cavity Inferiorly

Dorsal Scapular N. (C4,5)

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5
Q

Levator Scapulae M. (Layer 2)

A

Transverse Processes C1-C4

Medial border of scapula (Superior to scapular spine)

Elevate Scapula; Rotate Glenoid Cavity Inferiorly; Extend and Laterally Flex Neck

Dorsal Scapular N. (C5)

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6
Q

Serratus Posterior Superior M. (Layer 3)

A

Nuchal L. and Spinous Processes C7-T3

Superior surface of ribs 2-4

Elevate Ribs with Forced Inspiration (Proprioceptive)

Intercostal N. (2-5)

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7
Q

Serratus Posterior Inferior M. (Layer 3)

A

Spinous Processes T11-L2

Inferior Surface Ribs 8-12

Depress Ribs with Forced Expiration (Proprioceptive)

Anterior Rami (T9-12)

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8
Q

Splenius Capitus M. (Layer 4)

A

Lower 1/2 Ligamentum Nuchae & Spinous Processes C7-T3

Mastoid Process; Lateral 1/3 Superior Nuchal Line

Extend Neck (Bilaterally); Laterally Flex Neck & Rotate Face Toward (Unilaterally)

Posterior Rami

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9
Q

Splenius Cervicis M.

A

Spinous Process T3-T6

Transverse Process C1-C3

Extend Neck (Bilaterally); Laterally Flex Neck and Rotate Face Towards (Unilaterally)

Posterior Rami

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10
Q

Erector Spinae Group (Layer 5)

A
  • Iliocostalis (Lateral)
    • Iliocostalis Lumborum M.
    • Iliocostalis Thoracis M.
    • Iliocostalis Cervicis M.
  • Longissimus (Intermediate)
    • Longissimus Thoracis M.
    • Longissimus Cervicis M.
    • Longissimus Capitis M.
  • Spinalis (Medial)
    • Spinalis Thoracis M.
    • Spinalis Cervicis M.
  • Maintain erect posture; Extend vertebral column and head (Bilaterally); Laterally flex vertebral column (unilaterally)
  • Segmentally innervated by Posterior Rami of Spinal Nerves
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11
Q

Transversospinalis Group (Layer 6)

A
  • Semispinalis Group (5+ Segments)
    • Semispinalis Thoracis M.
    • Semispinalis Cervicis M.
    • Semispinalis Capitis M.
  • Multifidus M. (3-4 Segments)
  • Rotatores Longus M. (2 Segments)
  • Rotatores Brevis M. (1 Segment)
  • A: Extend Spine; Rotate Spine Away
    • Exception: Semispinalis Capitis - Extend Head; Rotate Face Away
  • N: Posterior Rami
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12
Q

Interspinalis M.

A

Extend Spine

Posterior Rami

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13
Q

Intertransversarii M.

A

Laterally Flex Spine

Posterior Portion (Posterior Rami); Anterior Portion (Anterior Rami)

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14
Q

Levator Costarum Longus M.

A

Transverse Processes C7-T11

2nd Rib Inferior to Origin

Elevate Ribs

Posterior Rami

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15
Q

Levator Costarum Brevis M.

A

Transverse Processes C7-T11

Adjacent Rib Inferior To Origin

Elevate Ribs

Posterior Rami

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16
Q

Rectus Capitis Posterior Major M.

A

C2 Spinous Process

Lateral Portion Inferior Nuchal Line

Extend Head; Rotate Face Toward

Suboccipital N.

17
Q

Rectus Capitis Posterior Minor M.

A

C1 Posterior Tubercle

Below Inferior Nuchal Line

Extend Head

Suboccipital N.

18
Q

Obliquus Capitis Inferior M.

A

Axis/C2 Spinous Process

Transverse Process C1

Rotate Face Toward

Suboccipital N.

19
Q

Obliquus Capitis Superior M.

A

C1 Transverse Process

Between Superior/Inferior Nuchal Lines

Extend & Laterally Flex Head

Suboccipital N.

20
Q

Pennate Muscles (Featherlike)

Tendon on one side, muscle on the other side

Muscle on either side of tendon

Multiple feathered muscle groups

A

Unipennate

Bipennate

Multipennate

21
Q

Fusiform Muscles (Spindle Shape w/ Thick Central Region and Tapered Ends)

Muscles with 2 heads

Muscles with 3 heads

Muscles with 4 heads

A

Bicipital

Tricipital

Quadracipital

22
Q

Muscles with 2 Bellies

A

Digastric Muscles

23
Q

Muscles broken up by Tendon

A

Multiventral Muscles

24
Q

Muscles with multiple Tendons

A

Multicaudal Muscles

25
Q

Muscles with a serrated edge

A

Serrated Muscles

26
Q

Muscles surrounding an opening

A

Circular / Sphincteral Muscles

27
Q

Muscles with equal sides

A

Quadrate Muscles

MSK Exam 1 (16 decks)

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