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40 Cards in this Set

  • Front
  • Back
Motor innervation of Trapezius
sensory innervation of Trapezius
ventral rami of C3 and C4
describe the subtrapezial plexus
Ventral rami of C3 & C4
Superficial branch of transverse cervical artery
Innervation of Latissimus dorsi
thoracodorsal nerve (middle subscapular C6-C8)
what nerve roots compose the thoracodorsal nerve?
actions of latissimus dorsi
adducts, extends and medial rotation of the arm
actions of Rhomboids
adducts the scapulae
motor and sensory innervation of the Rhomboids
Root of C5
Dorsal scapular nerve
what is the innervation of the Splenius muscles
dorsal rami of spinal nerves
what muscles comprise the Erector spinae muscle group
Spinalis m.
Longissimus m.
Illiocostalis m.
what is the main action of the erector spinae muscle group?
extension of the vertebral column
what is the erector spinae muscle group innervated by?
dorsal rami of spinal nerves
what part of the spinal column does the Spinalis m. cover?
what part of the spinal column does the Longissimus muscle stretch over?
what part of the spinal column does the Illiocostalis muscle stretch over?
describe a back strain
stretching/microscopic tearing of muscles, fibers, ligaments of the back
usually involves Erector Spinae muscles
Prevention: adequate warm up and stretching
Cause: extreme movements of vertebral column/using the back as a lever when lifting
Describe the semispinalis muscle group
located in the T, C, Cap regions
spans 4-6 segments
originate from transverse processes of vertebrae
describe the multifidus muscles
located in the L, T, C regions of spine
span 2-4 segments
originate from the transverse process of vertebrae
describe the Rotatores muscles
best developed in the Thoracic region
span 1-2 segments
originate from the transverse processes of the vertebrae
what is the action of the minor deep layer of muscles of the back?
act on vertebrae
produce movement at the intervertebral joints
what muscles compose the minor deep layer of the back?
Levatores costarium
what is the action of the interspinalis muscles
connect spinous process
innervated by dorsal rami of spinal nerves
where are the intertransversarii muscles located? innervation?
Cervical and Lumbar
connect transverse processes
innervated by dorsal & ventral rami of spinal nerves
Describe Levator costarum
connects the tips of the transverse processes of C7, T1-T11
innervated by dorsal rami C8-T11 of spinal nerves
Describe the small-large muscle groups of the back
in small-large muscle groups, large muscles have greater mechanical advantage & therefore the small muscles function more as organs of proprioception and the large muscles produce motion
describe the suboccipital triangle
muscles that extend the head on the atlas and rotate the head and atlas on the axis
What is considered the roof of the subocciptial triangle
Semispinalis capitis
Floor of Suboccipital triangle
Atlantooccipital membrane
Atlantoaxial membrane
Rectus captitus posterior minor
What is the innervation of the wall of the suboccipital triangle
dorsal rami of C1
Medial wall of subocciptial triangle
Rectus captitus posterior minor
Rectus captitus posterior major
Lateral wall of suboccipital triangle
oblique captis superior (superior oblique)
Inferior wall of suboccipital triangle
Oblique capitis inferior (inferior oblique)
what are the contents of the suboccipital triangle
suboccipital nerve (dorsal rami of C1)
Vertebral artery
origin of Greater occipital nerve
medial branch of C2
what is the function of the least occipital nerve
supplies the skin of the neck and the scalp behind the ear
where does the occipital artery arise from?
external carotid artery
where does the occipital vein empty into?
deep cervical and vertebral vein
origin of the lesser occipital nerve
anterior rami of cervical plexus
C2 & C3
Describe the triangle of Auscultation
Ribs 6 & 7
Intercostal space 6
Superior border: Trapezius
Inferior border: Latissimus dorsi
Lateral border: vertebral border of scapula
Floor: Rhomboid major
describe the lumbar triangle (of Petit)
It is a weak triangular space that can be the site of a lumbar hernia (rare)
Medial border: Latissimus dorsi
Lateral border: external oblique
Inferior border : Illiac crest
Floor: Internal oblique