Spinal Wet Lab Practical 1

Origin of Trapezius

External occipital protuberance

Insertion of Trapezius

Spine of scapula

Action of Trapezius

Elevates scapula

Innervation of Trapezius

Spinal accessory nerve (CN XI)

Origin of Latissimus dorsi

Iliac crest

Insertion of latissimus dorsi

Intertubercular groove of humerus

Action of Latissimus dorsi

Extension of arm at shoulder joint

Innervation of Latissimus dorsi

Thoracodorsal nerve

Origin of Levator scapulae

C1-C4 transverse process

Insertion of levator scapulae

Superomedial border of scapula

Action of levator scapulae

Elevates scapula

Innervation of levator scapulae

Dorsal scapular nerve

Origin of Rhomboid major

Supraspinous ligament

Insertion of Rhomboid major

Medial border of scapula

Action of Rhomboid major

Retracts scapula

Innervation of Rhomboid major

Dorsal scapular nerve

Origin of Rhomboid minor

Ligamentum nuchae

Insertion of Rhomboid minor

Superomedial border of scapula

Action of Rhomboid minor

Retracts scapula

Innervation of Rhomboid minor

Dorsal scapular nerve

Origin of Splenius capitis

Ligamentum nuchae

Insertion of Splenius capitis

Mastoid process of temporal bone

Action of Splenius capitis

Rotates neck

Innervation of Splenius capitis

Dorsal primary rami C2-C6 spinal nerves

Origin of Splenius cervicis

Supraspinous ligament

Insertion of Splenius cervicis

Lateral mass C1

Action of Splenius cervicis

Rotates neck

Innervation of Splenius cervicis

Dorsal primary rami C5-C8 spinal nerves

Origin of Serratus posterior superior

Supraspinous ligament

Insertion of Serratus posterior superior

Superolateral border of ribs 2-5

Action of Serratus posterior superior

Elevate upper 5 ribs during inspiration

Innervation of Serratus posterior superior

Intercostal nerves

Origin of Serratus posterior inferior

Supraspinous ligament

Insertion of Serratus posterior inferior

Inferolateral border of ribs 9-12

Action of Serratus posterior inferior

Draws lower 4 ribs inferiorly and posteriorly during expiration

Innervation of Serratus posterior inferior

Intercostal nerves

Origin of Iliocostalis lumborum

Iliac crest

Insertion of Iliocostalis lumborum

Transverse process L1-L4

Action of Iliocostalis lumborum

Extension of trunk

Innervation of Iliocostalis lumborum

Dorsal primary rami of thoracic and lumbar spinal nerves

Origin of Iliocostalis thoracis

Costal angles of ribs 7-12

Insertion of Iliocostalis thoracis

Costal angles of ribs 1-6

Action of Iliocostalis thoracis

Extends thoracic spine

Innervation of Iliocostalis thoracis

Dorsal primary rami of T1-T6 spinal nerves

Origin of Iliocostalis cervicis

Costal angles of ribs 3-6

Insertion of Iliocostalis cervicis

Posterior tubercles of transverse process of C4-C6

Action of Iliocostalis cervicis

Extends neck

Innervation of Iliocostalis cervicis

Dorsal rami of lower cervical and upper thoracic spinal nerves

Origin of Longissimus thoracis

Spinous process of L1-L5

Insertion of Longissimus thoracic

Transverse processes of thoracic and lumbar vertebrae

Action of Longissimus thoracis

Extends trunk

Innervation of Longissimus thoracis

Dorsal rami of thoracic and lumbar nerves

Origin of Longissimus cervicis

Transverse tubercles of T1-T6

Insertion of Longissimus cervicis

Posterior tubercles of transverse process C2-C6

Action of Longissimus cervicis

Extends neck

Innervation of Longissimus cervicis

Dorsal rami of C4-T2 spinal nerves

Origin of Longissimus capitis

Transverse tubercles of C4-T4

Insertion of Longissimus capitis

Mastoid process of temporal bone

Action of Longissimus capitis

Extends neck

Innervation of Longissimus capitis

Dorsal rami of cervical and upper thoracic spinal nerves

Origin of Spinalis thoracis

Spinous process of T11-3

Insertion of Spinalis thoracis

Spinous process of T2-T8

Action of Spinalis thoracis

Extends thoracic spine

Innervation of Spinal thoracis

Dorsal rami of thoracic and upper lumbar spinal nerves

Origin of Spinalis cervicis

Ligamentum nuchae

Insertion of Spinalis cervicis

Spinous process of C2-C4

Action of Spinalis cervivis

Extends neck

Innervation of Spinalis cervicis

Dorsal rami of lower cervical and upper thoracic spinal nerves

Origin of Spinalis capitis

Lateral aspect of lower cervical spinous process

Insertion of Spinalis capitis

Medial aspect between superior and inferior nuchal lines

Action of Spinalis capitis

Rotates head

Innervation of Spinalis capitis

Dorsal rami of lower cervical and upper thoracic spinal nerves

Origin of Semispinalis thoracis

Transverse tubercles of T6-T11

Insertion of Semispinalis thoracis

Spinous process of C6-T4

Action of Semispinalis thoracis

Extends trunk

Innervation of Semispinalis thoracis

Dorsal rami of thoracic spinal nerves

Origin of Semispinalis cervicis

Transverse tubercles of T1-T6

Insertion of Semispinalis cervicis

Spinous process of C2-C5

Action of Semispinalis cervicis

Extends neck

Innervation of Semispinalis cervicis

Dorsal rami of lower cervical and upper thoracic spinal nerves

Origin of Semispinalis capitis

Transverse processes of T1-T6

Insertion of Semispinalis capitis

Between superior and inferior nuchal lines

Action of Semispinalis capitis

Extends neck

Innervation of Semispinalis capitis

Dorsal ramus of C2

Origin of Multifibus

Dorsal surface of sacrum

Insertion of Multifidus

Spinous process 3-5 segments above origin

Action of Multifidus

Extends trunk

Innervation of Multifidus

Dorsal rami of cervical, thoracic, and lumbar spinal nerves

Origin of Rotator brevis

Transverse processes of thoracic vertebrae

Insertion of Rotator brevis

Laminae and spinous processes of thoracic vertebrae one segment above origin

Action of Rotator brevis

Rotates trunk

Innervation of Rotator brevis

Dorsal rami of spinal nerves at segmental level

Origin of Rotator longus

Transverse processes of thoracic vertebrae

Insertion of Rotator longus

Laminae and spinous processes of thoracic vertebrae two segments above origin

Action of Rotator longus

Rotates trunk

Innervation of Rotator longus

Dorsal rami of spinal nerves at segmental level

Origin of Rectus capitis posterior major

Spinous tubercle of C2

Insertion of Rectus capitis posterior major

Inferior nuchal line of occiput

Action of Rectus capitis posterior major

Extends head

Innervation of Rectus capitis posterior major

Dorsal ramus of C1