DPT 6160 FINAL EXAM: MUSCLES EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED
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Course
DPT 6160
Institution
DPT 6160
DPT 6160 FINAL EXAM: MUSCLES EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED
posterior rami (intertransversarii also innervated by anterior rami)
Which nerve innervates the back muscles?
splenius capitis & cervicis
What muscles make up the superficial layer of the intrinsic back mus...
posterior rami (intertransversarii also innervated by anterior rami)
Which nerve innervates the back muscles?
splenius capitis & cervicis
What muscles make up the superficial layer of the intrinsic back muscles?
splenius capitis
splenius cervicis
Erector spinae: (agonist)
iliocostalis
longissimus
spinalis
What muscles make up the intermediate layer of the intrinsic back muscles?
erector spinae muscles
Origin:
- iliac crest and sacrum
- sacroiliac and supraspinous ligaments
- sacral and inferior lumbar spinous processes
Insertion:
- iliocostalis: superiorly to lower ribs and cervical transverse process
- spinalis muscle: superiorly to spinous processes in upper thorax and cranium
,Actions:
- bilaterally: extension of spine & neck
- unilaterally: lateral flexion of spine
What muscle is this?
Origin?
Insertion?
Main Actions?
Create: contraction
- bilaterally: spinal extension
- unilaterally: ipsilateral lateral flexion of spine
How do the erector spinae muscles create movement?
iliocostalis
longissimus
spinalis
Transversospinales: (stabilizer)
- semispinalis
- multifudus
- rotatores (proprioceptor)
Minor: (proprioceptor)
interspinales
intertransversarii
levatores costarum
What muscles make up the deep layer of the intrinsic back muscles?
,- semispinalis capitis
- semispinalis cervicis
- semispinalis thoracis
What are the 3 segments of the semispinalis muscle?
semispinalis muscles
semispinalis capitis
semispinalis cervicis
semispinalis thoracis
multifudus muscle
Origin:
- sacrum & ligaments
- PSIS
- mammillary processes of lumbar
- transverse processes of thorax
- articular processes of C4-C7
Insertion:
spinous processes
Actions:
spinal extension
What muscle is this?
Origin?
Insertion?
Main Actions?
, rotatores muscle (brevis & longus)
Origin:
TP of spine
Insertion:
- junction of lamina
- TP/SP of spine superior to origin
Actions:
assists spinal extension & rotation
What muscle is this? (deepest)
Origin?
Insertion?
Main Actions?
interspinales muscle
intertransversarii muscle
levatores costarum muscle
What are the smallest muscles of the deep back muscles?
interspinales muscle
Origin:
superior SP of cervical and lumbar
Insertion:
inferior SP superior to origin
Actions:
aids in spinal extension & rotation
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