Gross - back
Terms
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- Trapezius innervation
- Motor - CN XI or spinal accesory nerve Sensory - C3, C4
- Trapezius attachments
- Supior nuchal line ligamentum nuchae C7-T12 Spine of scapulae Lateral 1/3rd of clavicle
- Trapezius action
- elevate, depress, and retract the scapula rotate glenoid supiorly
- Latissimus dorsi innervation
- Thoracodorsal (C6,C7,C8)
- Latissimus dorsi attachments
- spinous process of inferior 6 thoracic verbrae thoracolumbar fascia iliac cres inferior 3or4 ribs floor of intertubercular groove of humerus
- Latissimus dorsi actions
- extends, adducts, and medially rotates humerus
- borders of triangle of auscultation
- trapezius latissimus dorsi medial border of scapula
- borders of lumbar triangle
- latissimus dorsi external abdominal oblique iliac crest
- levator scapulae innervation
- dorsal scapular (C5) C3, C4
- levator scapulae attachments
- Transverse processes of C1-C4 Superior medial border of scapula to root of spine of scapula
- levator scapulae actions
- elevates scapula
- rhomboid minor and major innervation
- dorsal scapular (C5)
- rhomboid minor and major attachments
- spinous process of C7, T1(minor) and T2-T5 (major) and both on medial border of scapula
- rhomboid minor and major actions
- retracts the scapul
- what are the rhomboids important for?
- Posture
- serratus posterior superior innervation
- segmental ventral rami (intercostal nerve)
- serratus posterior superior attachments
- spinous processes of C7-T3 Superior border of ribs 2-4
- serratus posterior superior action
- elevate ribs during inspiration
- Splenius (cervicis and capitis) innervation
- segmental dorsal rami
- Splenius (cervicis and capitis) attachments
- spinous processes C7-T4 Mastoid process, lateral 1/3rd nuchal line transverse process of C1-C4
- Splenius (cervicis and capitis) action
- laterally flex neck, rotate head, extend head/neck
- semispinalis capitis innervation
- segmental dorsal rami
- semispinalis capitis attachments
- Transverse processes of C4-T4 Occipital bone, superior nuchal line
- semispinalis capitis actions
- extends head contralaterally rotates
- superior obliques capitis attachments
- lateral inferior nuchal line Transverse process of C1
- superior obliques capitis action
- rotate neck extend head
- superior obliques capitis innervation
- Motor - dorsal rami of C1 (suboccipital nerve) Sensory - dorsal rami of C2 (great occipital nerve)
- inferior obliques capitis attachments
- C2 spinous process C1 transverse process
- inferior obliques capitis action
- rotate head extend neck
- inferior obliques capitis innervation
- Motor - dorsal rami of C1 (suboccipital nerve) Sensory - dorsal rami of C2 (great occipital nerve)
- Rectus capitis posterior major attachments
- mid-inferior nuchal line spinous process of C2
- Rectus capitis posterior major actions
- rotate neck extend head
- Rectus capitis posterior major innervation
- Motor - Dorsal rami of C1 (suboccipital nerve) Sensory - Dorsal rami of C2 (greater occipital nerve)
- Rectus capitis posterior minor attachment
- medial inferior nuchal line Posterior tubercle of C1
- Rectus capitis posterior minor actions
- rotate neck extend head
- Rectus capitis posterior minor innervation
- Motor - Dorsal rami of C1 (suboccipital nerve) Sensory - Dorsal rami of C2 (greater occipital nerve)
- Suboccipital nerve function
- Supplies only motor function to suboccipital region (C1 dorsal rami)
- Greater occipital nerve function
- Supplies only sensory function to suboccipital region and posterior head (C2 dorsal rami)
- Least Occipital nerve
- Mixed fibers (motor and sensory) to segmental musculature and skin (C3 Dorsal Rami)
- Where can you find the vertebral artery?
- In the suboccipital triangle
- Where is the superficial branch of the transverse cervical artery?
- anterior side of the trapezius
- Where is the deep branch of the transverse cervical artery (dorsal scapular artery)
- Medial border of the scapula
- Erector spinae innervation
- segmental dorsal rami
- erector spinae actions
- extend back/neck/head laterally flex
- errector spinae common attachment
- iliac crest sacrum spinous processes
- Three columns of the erector spinae
- Iliocostalis Longissimus Spinalis
- distal attachment of illiocostalis
- inferior angle of ribs
- distal attachment of longissimus
- ribs transvers processes matoid process
- distal attachment of spinalis
- spinous processes
- Transversospinalis innervation
- segmental dorsal rami
- transversospinalis actions
- stabilize extend rotate spine
- transversospinal common attachment
- all muscles attach to transverse processes and run superomedially to spinous process of vertebrae
- Muscles in the transversospinalis muscle group
- semispinalis multifidus rotatores
- semispinalis span
- 4-6 vertebral segments
- multifidus span
- 2-4 vertebral segments
- rotatores span
- brevis = 1 vertebral segment Longus = 2 vertebral segments
- Levator costarum innervation
- segmental dorsal rami
- levator costarum attachment
- transverse processes C7-T11 Ribs between tubercle and angle
- levator costarum actions
- elevate ribs lateral flexion of vertebral column