Intrinsic Back Muscle POINA's

Question 1

Origin of Splenius (capitis and cervicis)

Answer 1

Nuchal Ligament
SP of C7-T6

Question 2

Insertion of Splenius Capitis

Answer 2

Mastoid process
Superior nuchal line
Fibers run superolaterally!

Question 3

Insertion of Splenius Cervicis

Answer 3

TP of C1-C4

Same as levator! Travel buddies!

Question 4

Nerve Innervation of Splenius (both)

Answer 4

Posterior/Dorsal Rami of Spinal Nerves

Question 5

Muscle Action of Splenius (both)

Answer 5

Bilateral: head/neck EXTENSION

Unilateral:
IPSILATERAL head ROTATION
LATERAL neck FLEXION

Question 6

Purposeful Activity of Splenius (both)

Answer 6

Driving, communication (shaking/nodding head)

Question 7

Purposeful Activity of Iliocostalis

Answer 7

Maintaining upright posture for ADL’s

Question 8

Origin of Iliocostalis

Answer 8

Thoracolumbar fascia / Common tendon which attaches to:
-SP of Lumbar spine and T11-12
-Iliac crest
-Posterior surface of sacram

SIP!

Question 9

Insertion of Iliocostalis

Answer 9

-Cervical TP
-Lower rib angles

Include new last name!

Question 10

Nerve innervation of Iliocostalis

Answer 10

Dorsal/Posterior Rami of Spinal Nerves

Question 11

Action of Iliocostalis

Answer 11

Bilateral: Vertebral column extension

Unilateral: IPSILATERAL vertebral column LATERAL FLEXION

Question 12

Purposeful Activity of Longissimus

Answer 12

Upright posture for ADL’s

Question 13

Origin of Longissimus

Answer 13

Thoracolumbar / Common Tendon
-SP of T11-12 and lumbar spine
-Iliac crest
-Posterior surface of sacrum

Question 14

Insertion of Longissimus

Answer 14

-B/w rib tubercles and Thoracic TP
-Mastoid Process

Include new last name!

Question 15

Nerve innervation of Longissimus

Answer 15

Dorsal/Posterior Rami of Spinal Nerves

Question 16

Action of Longissimus

Answer 16

Bilateral: Vertebral column EXTENSION

Unilateral: IPSILATERAL vertebral column LATERAL FLEXION

Question 17

Purposeful Activity of Spinalis

Answer 17

Maintaining upright posture for ADL’s

Question 18

Origin of Spinalis

Answer 18

Thoracolumbar fascia / common tendon
-SP of T11-T12
-Iliac crest
-Posterior surface of sacrum

Question 19

Insertion of Spinalis

Answer 19

Upper thoracic and cervical SP

Include new last name!

Question 20

Nerve innervation of Spinalis

Answer 20

Dorsal/posterior Rami of Spinal Nerves

Question 21

Action of Spinalis

Answer 21

Bilateral: EXTENSION of vertebral column

Unilateral: IPSILATERAL vertebral column LATERAL FLEXION

Question 22

Purposeful activity of Rotatores

Answer 22

Deep postural stability

Question 23

Origin of Rotatores

Answer 23

TP of the vertebrae
Most prominent in THORACIC spine!

Question 24

Insertion of Rotatores

Answer 24

SP of vertebrae through C2
Two types! Spans 1-2 segments
-Brevus = 1
-Longus = 2

Question 25

Nerve innervation of Rotatores

Answer 25

Dorsal/posterior rami of spinal nerves

Question 26

Action of Rotatores

Answer 26

Bilateral: Vertebral column LOCAL extension. Unilateral: CONTRALATERAL ROTATION of vertebral column May also act as proprioception

Question 27

Purposeful activity of multifidus

Answer 27

Deep postural stability

Question 28

Origin of multifidus

Answer 28

S - Sacro Iliac (SI) Ligaments T - TP of T1-T3 A - aponeurosis of erector spinae A - Articular processes of C4-C7 M - Mammillary processes of lumbar vertebrae P - PSIS P - Posterior Sacrum Remember Stamp!

Question 29

Insertion of multifidus

Answer 29

Entire length of SP's SPANS 2-4 SEGMENTS Fibers run superomedially, and are MOST PROMINENT IN LUMBAR REGION

Question 30

Nerve Innervation of Multifidus

Answer 30

Dorsal/Posterior Rami of Spinal Nerves

Question 31

Action of Multifidus

Answer 31

Bilateral: -Vertebral Column LOCAL EXTENSION -STABILIZES vertebrae during local movement Unilateral: -CONTRALATERAL ROTATION of vertebral column

Question 32

Purposeful activity of Semispinalis

Answer 32

Looking overhead, using a computer

Question 33

Origin of Semispinalis

Answer 33

-TP of C4-T12

Question 34

Insertion of Semispinalis

Answer 34

Fibers run superomedially to occipital bone SP of thoracic and cervical spine SPANS 4-6 SEGMENTS MOST PROMINENT IN CERVICAL SPINE DONT FORGET CAPITIS/CERVICIS/THORACIS

Question 35

Nerve innervation of Semispinalis

Answer 35

CERVICAL Dorsal/Posterior Rami of CERVICAL Spinal Nerves

Question 36

Action of Semispinalis

Answer 36

Bilateral: -Head/neck/thoracic spine EXTENSION Unilateral: -Head/neck/thoracic spine CONTRALATERAL ROTATION