what muscles are in the superficial layer of your back ?
trapezius, latissimus dorsi, rhomboid major and minor, levator scapulae
what is the superficial layer of back muscles innervated by
anterior rami of spinal nerves
action of trapezius
upper fibers: elevates scapula and rotates during abduction of arm
middle: retract scapula
lower: pull scapula inferiorly
action of latissimus dorsi
extends adducts and medially rotates upper limb
action of levator scapulae
elevates scapula
action of rhomboids
retracts and rotates scapula
what are the intermediate muscles of the back
serratus posterior superior and inferior
- innervated: anterior rami of spinal nerves, intercostal nerves
what are the superficial intrinsic muscles of the back
superficial (spinotransversales)
- splenius capitis: roatate head to same side
splenius cervicis: rotate head to same side
intermediate (3 that form erector spinae)
- iliocostalis (lat): laterally flex vertebral column, bilaterally extends the vertebral column and head
- longissimus: unilaterlly - laterally flex vertebral column, bilaterally - extends vertebral column
- spinalis (med): unilaterally - laterally flex vertebral, bilaterally - extend vertebral column
what are teh deep intrinsic muscles of the back
deep (transversospinales)
- semispinalis: extends and contralaterally rotates head and vertebral column
- multifidus: stabilises vertebral column
- rotatores: contributes to extension and rotation of vertebral column, stabilises vertebrae and has proprioceptive funciton
also (but minor)
- interspinales
- intertransversarii
- levatores costarum
what 4 muscles help move the head
all help to rotate head left and right and extend towards back
what 4 muscle pairs in the back move shoulders –
what 5 pairs of back muscles move the upper arms
what piars of deep muscles move the spine
what muscles move the upper legs (thigh)
what is a back muscle sprain?
how does a strain happen
what are the 3 grades of strain
signs of back muscle strain
tx for back muscle strain
back muscle strain and massage
risks
- vigorous intrusive massage to new/acute injury might make inflammation and tissue damage worse
benefits
- carefully performed massage
- acute strains (lymphatic drainage) , limit edema
what is a herniated/bulging disc
what does a herniated disc occur
types of herniated discs
signs of herniated discs