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ANAT 392 > Muscles of the back > Flashcards

Muscles of the back Flashcards

1
Q

Trapezius

A

Origin: Sup nuchal line, EOP, SP C7-T12, Nuchal ligament
Insertion: Lateral third clavicle, acromion, spine of scap
Innervation: CN 11, Ventral rami C3 and C4 spinal nerve (sensory proprioceptive fibres)
Function: elevate (superior firbers), retract (mid), depress (lower), upward rotation (superior and lower)

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2
Q

Latisimus Dorsi

A

Origin: spinous process T7-L5, posterior half iliac crest, back of sacrum.
Insertion: Depth of intertubercular groove
Innervation: Thoracodorsal nerve
Function: GH extension (prime mover), adduction, medial rotation

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3
Q

Levator scapulae

A

Origin: TP C1-C4
Insertion: Superior angle & medial aspect of scapula
Innervation: Ventral rami of C3, C4 and dorsal scapular nerve
Function: Elevate scap

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4
Q

Rhomboid minor

A

Origin: SP C7-T1
Insertion: medial border of scap above spine
Innervation: Dorsal scapular nerve
Function: elevate and retract

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5
Q

Rhomboid major

A

Origin: SP t2-T5
Insertion: medial border scap below spine
Innervation: Dorsal scapular nerve
Function: Elevate and retract

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6
Q

Serratus posterior superior

A

Origin: SP C7-T3
Insertion: Ribs 2-5
Innervation: Ventral rami T2-T5
Function: elevate ribs 2-5

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7
Q

serratus posterior inferior

A

Origin: SP T11-L3
Insertion: Ribs 9-12
Innervation: Ventral rami T2-T5
Function: depress ribs 9-12

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8
Q

Splenius capitis

A

Origin: Spinous process C7 - T4
Insertion: Mastoid process & lateral 1/3 superior nuchal line
Innervation: Dorsal rami mid cervical spinal nerves
Function: unilat - ipsilateral head/neck rotation. bilateral - extension of head/neck

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9
Q

Splenius cervicis

A

Origin: SP T3-T6
Insertion: TP C1-C3
Innervation: Dorsal rami mid cervical spinal nerves
Function: unilat - ipsilateral head/neck rotation. bilateral - extension of head/neck

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10
Q

Iiocostalis

A

Origin: cervicis - upper 6 ribs, thoracis: lower 6 ribs
Lumborum - sacrum
Insertion: cervicis - Csp vertebrae, thoracis - upper 6 vertebrae, lumbprum - lower 6 ribs
Inervation: Dorsal rami of spinal nerve
Function: extend vertebral collumn

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11
Q

Longisimus

A

Origin: capitis - head, cervicis: cervical vertebrae, thoracis: upper 6 ribs
Insertion: capitis - cervical vertebrae, cervicis- upper 6 ribs, thoracis - lower 6 ribs
Inervation: Dorsal rami of spinal nerve
Function: extend vertebral collumn

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12
Q

Spinalis

A

Origin: capitis - head, cervicis: cervical vertebrae, thoracis - upper 6 ribs
Insertion: capitis - cervical vertebrae, cervicis - upper 6 ribs, thoracis - lower 6 ribs
Inervation: Dorsal rami of spinal nerve
Function: extend vertebral collumn

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13
Q

Rotatores

A

Origin: TP of vertebrae
Insertion: SP 2 levels above
Innervation: Dorsal rami of spinal nerves
Function: Stabilize vertebral collumn

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14
Q

Multifidus

A

Origin: TP of vertebrae
Insertion: SP 4 levels above
Innervation: Dorsal rami of spinal nerves
Function: Stabilize vertebral collumn

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15
Q

Semispinalis

A

Origin: TP of vertebrae
Insertion: SP 6 levels above
Innervation: Dorsal rami of spinal nerves
Function: Stabilize vertebral collumn

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16
Q

Levator costarum

A

Origin: TP of thoracic vertebrae
Insertion: 1 or 2 ribs below origin
Innervation: Dorsal rami of spinal nerves
Function: elevate ribs

17
Q

Inter transversarius

A

Origin/Insertion: run between transverse process of adjacent vertebrae
Innervation: dorsal rami of spinal nerves
Function: stabalize verterbal collumn

18
Q

Interspinalis

A

Origin/Insertion: runs between adjacent spinous process of vertebrae
Innervation: Dorsal rami of spinal nerves
Function: Stabilize vertebral collumn

19
Q

Obliquus capitis superior

A

Origin: TP C1
Insertion: Planum nuchae
Innveration: suboccipital nerve
Function: extend and side flexion of head on atlas

20
Q

Obliqus capitis iniferior

A

Origin: SP C2
Insertion: TP C1
Innveration: suboccipital nerve
Function: rotates atlas on axis

21
Q

rectus capitis posterior major

A

Origin: SP C2
Insertion: lateral aspect superior nuchal line
Innveration: suboccipital nerve
Function: extend and slightly rotate head

22
Q

rectus capitis posterior minor

A

Origin: posterior tubercle of atlas
Insertion: medial aspect superior nuchal line
Innveration: suboccipital nerve
Function: extend and slightly rotate head

23
Q

Quadratus Lumborum

A

Origin: Iliac crest and TP of Lumbar vertebrae
Insertion: Inferior border of rib 12
Innervation: ventral rami of spinal nerves
Function: pulls down and stabalizes rib 12, ipsilat side flexion

24
Q

Psoas minor

A

Origin: TP T12
Insertion: Pecten of pubis
Innervation: direct branch of lumbar nerve
Function: weak hip flexor

25
Q

Psoas major

A

origin: Body and TP of lumbar vertebrae
Insertion: lesser trochanter
Innervation: direct branch of lumbar nerve
Function: hip flexion

26
Q

iliacus

A

Origin: Iliac fosa
Insertion: lesser trochanter
Innervation: femoral nerve
Function: hip flexor

ANAT 392 (9 decks)

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