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Gross Anatomy > Back Muscles > Flashcards

Back Muscles Flashcards

1
Q

Extrinsic Muscles of the Back
1. Superficial Group -move the upper limbs
-innervated by various superficial nerves
2. Intermediate Group -move the ribs.
-Innervated by the anterior rami of the spinal nerves

A

Epaxial Muscles of the Back

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2
Q

Psoas Major and Quadratus Lumborum)
-are innervated by the anterior rami

A

Hypaxial Muscles

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3
Q

Superficial Group

A

Trapezius
Latissimus Dorsi
Levator Scapuli
Rhomboid major
Rhomboid minor

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4
Q

Trapezius Origin

A

Superior nuchal line, external occipital protuberance, ligamentum nuchae, spinous processes of CVII to TXII

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5
Q

Trapezius Insertion

A

Lateral one-third of clavicle, acromion, spine of scapula

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6
Q

Trapezius Innervation

A

Motor—accessory nerve [XI]; proprioception—C3 and C4

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7
Q

Trapezius Function

A

Assists in rotating the scapula during abduction of humerus above horizontal; upper fibers elevate, middle fibers adduct, and lower fibers depress scapula

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8
Q

Latissimus dorsi
Origin

A

Spinous processes of TVII to LV and sacrum, iliac crest, ribs X to XII

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9
Q

Latissimus dorsi Insertion

A

Floor of intertubercular sulcus of humerus

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10
Q

Latissimus dorsi Innervation

A

Thoracodorsal nerve (C6 to C8)

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11
Q

Latissimus dorsi Function

A

Extends, adducts, and medially rotates humerus

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12
Q

Levator scapulae Origin

A

Transverse processes of CI to CIV

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13
Q

Levator scapulae Insertion

A

Upper portion medial border of scapula

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14
Q

Levator scapulae Innervation

A

C3 to C4 and dorsal scapular nerve (C4, C5)

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15
Q

Levator scapulae Function

A

Elevates scapula

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16
Q

Rhomboid major Origin

A

Spinous processes of TII to TV

17
Q

Rhomboid major Insertion

A

Medial border of scapula between spine and inferior angle

18
Q

Rhomboid major Innervation

A

Dorsal scapular nerve (C4, C5)

19
Q

Rhomboid major Function

A

Retracts (adducts) and elevates scapula

20
Q

Rhomboid minor Origin

A

Lower portion of ligamentum nuchae, spinous processes of CVII and TI

21
Q

Rhomboid minor Insertion

A

Medial border of scapula at the spine of scapula

22
Q

Rhomboid minor Innervation

A

Dorsal scapular nerve (C4, C5)

23
Q

Rhomboid minor Function

A

Retracts (adducts) and elevates scapula

24
Q

Serratus posterior superior Origin

A

Lower portion of ligamentum nuchae, spinous processes of CVII to TIII and supraspinous ligaments

25
Q

Serratus posterior superior Insertion

A

Upper border of ribs II to V just lateral to their angles

26
Q

Serratus posterior superior Innervation

A

Anterior rami of upper thoracic nerves (T2 to T5)

27
Q

Serratus posterior superior Function

A

Elevates ribs II to V

28
Q

Serratus posterior inferior Origin

A

Spinous processes of TXI to LIII and supraspinous ligaments

29
Q

Serratus posterior inferior Insertion

A

Lower border of ribs IX to XII just lateral to their angles

30
Q

Serratus posterior inferior Innervation

A

Anterior rami of lower thoracic nerves (T9 to T12)

31
Q

Serratus posterior inferior Function

A

Depresses ribs IX to XII and may prevent lower ribs from being elevated when the diaphragm contracts

32
Q

Intermediate Group

A

Serratus posterior superior
Serratus posterior inferior

33
Q
  1. Splenius capitis
  2. Splenius cervicis
A

Spinotransversesalis Muscle Group

34
Q
  1. Iliocostalis lumborum
  2. Iliocostalis thoracis
  3. Ilicostalis cervicis
  4. Longissimus thoracis
  5. Longissimus cervicis
  6. Longissimus capitis
  7. Spinalis thoracis
  8. Spinalis cervicis
  9. Spinalis capitis
A

Errector spinae Muscle Group

35
Q
  1. Semispinalis thoracis
  2. Semispinalis cervicis
  3. Semispinalis capitis
  4. Multifidus
  5. Rotatores lumborum
  6. Rotatores thoracis
  7. Rotatores cervicis
A

Transversopinales Muscle Group

36
Q
  1. Levatores costarum (Elevates Ribs)
  2. Interspinales
  3. Intertransversari
A

Segemental Muscle Group

37
Q
  1. Rectus capitis posterior major
    1. Rectus capitis posterior minor
    2. Obliqus capitis inferior
    3. Obliqus capitis superior
A

Suboccipital Muscle Group

Gross Anatomy (15 decks)

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