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