Spinal Anatomy Lab Practical 1 Muscle OIAN's

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Trapezius origin and insertion

external occipital protuberance; spine and acromion of scapula

Trapezius action and innervation

elevates scapula, spinal accessory nerve

Latissimus Dorsi origin and insertion

iliac crest; intertubercular sulcus of humerus

Latissimus Dorsi action and innervation

extend/flex lumbar spine; thoracodorsal nerve

Levator Scapulae origin and insertion

lateral mass C1; superomedial border of scapula

Levator Scapulae action and innervation

elevates scapula; dorsal scapular nerve

Rhomboid Major origin and insertion

spinous process T2-T5, medial border of scapula

Rhomboid Major action and innervation

retract scapula; dorsal scapular nerve

Rhomboid Minor origin and insertion

ligamentum nuchae; superomedial border of scapula

Rhomboid Minor action and innervation

retract scapula, dorsal scapular nerve

Splenius Capitis origin and insertion

supraspinous ligament; mastoid process of temporal bone

Splenius Capitis action and innervation

laterally flex neck; dorsal primary rami of lower cervicals

Splenius Cervicis origin and insertion

supraspinous ligament; lateral mass of C1

Splenius Cervicis action and innervation

laterally flex neck; dorsal primary rami of lower cervicals

Serratus Posterior Superior origin and insertion

supraspinous ligament; upper outer border of ribs 2-5

Serratus Posterior Superior action and innervation

elevate upper 5 ribs during inspiration; intercostal nerves

Serratus Posterior Inferior origin and insertion

supraspinous ligament; inferior outer border of ribs 9-12

Serratus Posterior Inferior action and innervation

forced inspiration; intercostal nerves

Iliocostalis Lumborum origin and insertion

iliac crest; transverse process L1-L5

Iliocostalis Lumborum action and innervation

lateral movement of pelvis; dorsal primary rami of lower thoracics

Iliocostalis Thoracis origin and insertion

upper border of costal angles of 6-7 ribs; upper border of costal angles 1-6

Iliocostalis Thoracis action and innervation

extension of thoracic spine; dorsal rami of upper 6 thoracic spinal nerves

Ilicostalis Cervicis origin and insertion

costal angles of 3-6 ribs; posterior tubercles C3-C6

Iliocostalis Cervicis action and innervation

extension of lower cervical spine; dorsal rami of lower cervical spinal nerves

Longissimus Thoracis origin and insertion

supraspinous ligament; transverse tubercle of T1-T12

Longissimus Thoracis action and innervation

lateral flexion of thoracic spine and ribs; dorsal rami of thoracic spinal nerves

Longissimus Cervicis origin and insertion

transverse tubercles T1-T5, posterior tubercle C3-C6

Longissimus Cervicis action and innervation

lateral flexion of neck; dorsal rami of C4-C8, T1, T2 spinal nerves

Longissimus Capitis origin and insertion

transverse tubercles T1-T5; mastoid process of temporal bone

Longissimus Capitis action and innervation

lateral flexion of neck; dorsal rami of C1-C3 spinal nerves

Spinalis Thoracis origin and insertion

spinous process T11-T12; spinous process T1-T4

Spinalis Thoracis action and innervation

extend thoracic spine; dorsal rami of thoracic and upper lumbar spinal nerves

Spinalis Cervicis origin and insertion

spinous process C7-T6; spinous process C2-C4

Spinalis Cervicis action and innervation

lateral flexion of neck; dorsal rami of lower cervical and upper thoracic spinal nerves

Spinalis Capitis origin and insertion

spinous processes C7-T7; below superior nuchal line

Spinalis Capitis action and innervation

lateral flexion of head; dorsal rami of lower cervical and upper thoracic spinal nerves

Semispinalis Thoracis origin and insertion

transverse tubercles of T6-T10; spinous process C6-T4

Semispinalis Thoracis action and innervation

lateral flexion of thoracic spine and ribs; dorsal rami of thoracic and lumbar spinal nerves

Semispinalis Cervicis origin and insertion

transverse tubercles T1-T5; spinous process C2-C5

Semispinalis Cervicis action and innervation

lateral flexion of neck; dorsal rami C6-C8 spinal nerves

Semispinalis Capitis origin and insertion

transverse tubercles C7-T7; below superior nuchal line

Semispinalis Capitis action and innervation

turns face to side; dorsal rami C1-C6 spinal nerves

Multifidus origin and insertion

dorsal sacroiliac ligaments; spinous process 3-5 segments above origin?

Multifidus action and innervation

bilaterally extends spine; dorsal rami C3-C8, T1-T12, L1-L5, S1 spinal nerves

Rotator Brevis origin and insertion

dorsal surface of sacrum; base of spinous process 1 segment above C2-L5

Rotator Brevis action and innervation

rotation of segment above; dorsal rami of spinal nerves at level

Rotator Longus origin and insertion

dorsal surface of sacrum; base of spinous process 1 segment above C2-L5

Rotator Longus action and innevation

rotate of segment above; dorsal rami of spinal nerves at level

Rectus Capitis Posterior Major origin and insertion

spinous tubercle C2; lateral part of inferior nuchal line of occipital bone

Rectus Capitis Posterior Major action and innervation

turns face to side; subocciptial nerve dorsal ramus of C1

Rectus Capitis Posterior Minor origin and insertion

posterior tubercle C1; medial part of inferior nuchal line

Rectus Capitis Posterior Minor action and innervation

extends head; subocciptal nerve dorsal ramus of C1

Obliquus Capitis Inferior origin and insertion

spinous process C2; posterior tubercle of C1

Obliquus Capitis Inferior action and innervation

turns face to side; subocciptal nerve dorsal ramus of C1

Obliquus Capitis Superior origin and insertion

posterior tubercle of C1; between superior and inferior nuchal lines

Obliquus Capitis Superior action and innervation

lateral flexion of head; subocciptal nerve dorsal ramus of C1

Interspinalis origin and insertion

spinous tubercle C2-C7, T1-T3, T11-T12, L1-L5; spinous process of adjacent segment

Interspinalis action and innervation

extends spine; dorsal rami of cervical, thoracic, lumbar spinal nerves

Longus Colli origin and insertion

anterior tubercles of transverse processes of C3-C5, anterior tubercle of anterior arch of C1

Longus Colli action and innervation

lateral flexion of neck; ventral rami C2-C6 spinal nerves

Longus Capitis origin and insertion

anterior tubercles of transverse processes C3-C6; basilar part of occipital bone

Longus Capitis action and innervation

flex head; ventral rami of C1-C3 spinal nerves

Rectus Capitis Anterior origin and insertion

lateral mass/costal element transverse process C1; basilar part of occipital bone

Rectus Capitis Anterior action and innervation

flex head; ventral rami of C1-C2 spinal nerves

Rectus Capitis Lateralis origin and insertion

costal element transverse process C1; jugular process of occipital bone

Rectus Capitis Lateralis action and innervation

laterally flex head; ventral rami of C1-C2 spinal nerves

Anterior Scalene origin and insertion

anterior tubercle transverse process C3-C6; scalene tubercle of first rib

Anterior Scalene action and innervation

elevates first rib; ventral rami C2-C6 spinal nerves

Middle Scalene origin and insertion

transverse process C1-C2; between tubercle and groove for subclavian artery on first rib

Middle Scalene action and innervation

elevates first rib; ventral rami C3-C8 spinal nerves

Posterior Scalene origin and insertion

posterior tubercle C4-C6; outer surface of rib 2

Posterior Scalene action and innervation

elevates 2nd rib; ventral rami C6-C8 spinal nerves

Quadratus Lumborum origin and insertion

iliac crest; 12th rib

Quadratus Lumborum action and innervation

stabilizes and depresses 12th rib; ventral rami T12-L3 spinal nerves

Levator Costarum Longus/Brevis origin and insertion

transverse tubercles C7-T11; between costal tubercle and costal angle of rib below

Levator Costarum Longus/Brevis action and innervation

elevate ribs; dorsal rami of thoracic spinal nerves