Anatomy Exam 1 - All Muscle Charts

Pectoralis Major Peripheral Innervation

Medial pectoral nerve & lateral pectoral nerve

Pectoralis Major Spinal Innervation

C5-T1 [medial pectoral nerve (C8-T1), lateral pectoral nerve (C5-C7)]

Pectoralis Minor Peripheral Innervation

Medial pectoral nerve & lateral pectoral nerve

Pectoralis Minor Spinal innervation

C5-T1 [medial pectoral nerve (C8-T1), lateral pectoral nerve (C5-C7)]

Serratus Anterior Peripheral Innervation

Long thoracic nerve

Serratus Anterior Spinal Innervation

C5-C7

Rectus Abdominus Attachments

P: Xiphoid process, costal cartilages (5th-7th costal cartilages)

D: Pubis (pubic symphysis and pubic crest)

Rectus Abdominus Actions

Trunk flexion, compress and support viscera (stabilizes and controls tilt of pelvis)

Rectus Abdominus Peripheral Innervation

Thoracoabdominal nerves & subcostal nerve

Rectus Abdominis Spinal Innervation

6-T12 [thoracoabdominal nerves (T6-T11), subcostal nerve (T12)]

External Oblique Attachments

Ribs (external surface of ribs 5-12)

Ilium (anterior half of iliac crest), pubis (pubic tubercle), linea alba

External Oblique Actions

Trunk flexion, trunk lateral flexion, trunk rotation, compress and support viscera

External Oblique Peripheral Innervation

Thoracoabdominal nerves & subcostal nerve

External Oblique Spinal Innervation

T7-T12 [thoracoabdominal nerves (T6-T11), subcostal nerve (T12)]

Internal Oblique Attachments

Thoracolumbar fascia, ilium (anterior two thirds of iliac crest), inguinal ligament

Ribs (inferior borders of 10-12), linea alba, pubis

Internal Oblique Actions

Trunk flexion, trunk lateral flexion, trunk rotation, compress and support viscera

Internal Oblique Peripheral Innervation

Thoracoabdominal nerves, subcostal nerve, iliohypogastric nerve, ilioinguinal nerve

Internal Oblique Spinal Innervation

T7-L1 [thoracoabdominal nerves (T7-T11), subcostal nerve (T12), iliohypogastric nerve (L1), ilioinguinal nerve (L1)]

Transversus Abdominis Attachments

Costal cartilages (internal surfaces 7-12), thoracolumbar fascia, ilium (iliac crest), inguinal ligament

Linea alba, pubis

Transversus Abdominis Actions

Compresses and supports viscera

Transversus Abdominis Peripheral Innervation

Thoracoabdominal nerves, subcostal nerve, iliohypogastric nerve, ilioinguinal nerve

Transversus Abdominis Spinal Innervation

T7-L1 [thoracoabdominal nerves (T7-T11), subcostal nerve (T12), iliohypogastric nerve (L1), ilioinguinal nerve (L1)]

Trapezius Attachments

Occipital bone (occipital protuberance, nuchal ligament (medial third of superior nuchal line), spinous processes of cervical and thoracic vertebrae (C7-T12)

Lateral 1/3 of clavicle, acromion and spine of scapula

Trapezius Actions

Bilateral: head & neck extension

Unilateral: head & neck lateral flexion, trunk lateral flexion, trunk rotation

Trapezius Peripheral Innervation

Spinal accessory nerve (CN XI) & ventral rami of C3-C4

Trapezius Cranial/Spinal Innervation

Spinal accessory nerve (CN XI), C3-C4

Latissimus Dorsi Attachments

Spinous processes of thoracic vertebrae (inferior 6 thoracic), thoracolumbar fascia, ribs(inferior 3 or 4), ilium (iliac crest)

Intertubercular sulcus (groove) of humerus

Latissimus Dorsi Actions

Trunk lateral flexion, trunk rotation

Latissimus Dorsi Peripheral Innervation

Thoracodorsal Nerve

Latissimus Dorsi Spinal Innervation

C6-C8

Levator Scapulae Attachments

Transverse processes of posterior tubercles of cervical vertebrae (C1-C4)

Superior angle of scapula, medial border of scapula superior to the scapular spine

Levator Scapulae Actions

Bilateral: neck extension

Unilateral: neck lateral flexion

Levator Scapulae Peripheral Innvervation

Dorsal scapular nerve & ventral rami of C3-C4

Levator Scapulae Spinal Innvervation

C3-C5 [dorsal scapular nerve (C5)]

Rhomboid Major Attachments

Spinous processes of thoracic vertebrae (T2-T5)

Medial border of scapula inferior to scapular spine

Rhomboid Major Actions

Trunk lateral flexion, trunk rotation

Rhomboid Major Peripheral Innervation

Dorsal scapular nerve & ventral ramus of C4

Rhomboid Major Spinal Innervation

C4-C5 [dorsal scapular nerve (C5)]

Rhomboid Minor Attachments

Nuchal ligament, spinous processes of C7-T1

Medial border of scapula at scapular spine

Rhomboid Minor Action

Trunk lateral flexion, trunk rotation

Rhomboid Minor Peripheral Innervation

Dorsal scapular nerve & ventral ramus of C4

Rhomboid Minor Spinal Innervation

C4-C5 [dorsal scapular nerve (C5)]

Serratus Posterior Superior Peripheral Innervation

Intercostal nerves

Serratus posterior superior spinal innervation

T2-T5

Serratus Posterior Inferior Peripheral Innervation

Intercostal nerves & subcostal nerve

Serratus Posterior Inferior Spinal Innervation

T9-T12 [intercostal nerves (T9-T11), subcostal nerve (T12)]

Erector Spinae Spinalis Attachments

Nuchal ligament; spinous processes of cervical, thoracic, and

lumbar vertebrae

Spinous processes of cervical and thoracic vertebrae

Erector Spinae Spinalis Action

Bilateral: neck extension, trunk extension

Unilateral: neck lateral flexion, trunk lateral flexion

Erector Spinae Spinalis Peripheral Innervation

Dorsal Rami

Erector Spinae Spinalis Spinal Innervation

Cervical (lower), thoracic, and lumbar spinal nerves

Erector Spinae Longissimus Attachments

Transverse processes of cervical and thoracic vertebrae, spinous processes of lumbar vertebrae, dorsal sacrum, ilium

Temporal bone, posterior tubercles of cervical vertebrae, transverse processes of thoracic and lumbar vertebrae, ribs

Erector Spinae Longissimus Action

Bilateral: head extension, neck extension, trunk extension

Unilateral: head rotation, head lateral flexion, neck lateral flexion, trunk lateral flexion

Erector Spinae Longissimus Peripheral Innervation

Dorsal Rami

Erector Spinae Longissimus Spinal Innervation

Cervical, thoracic, and lumbar spinal nervers

Erector Spinae iliocostalis Attachments

Ribs, ilium, posterolateral sacrum

Posterior tubercles of cervical vertebrae, ribs

Erector Spinae iliocostalis Action

Bilateral: neck extension, trunk extension

Unilateral: neck lateral flexion, trunk lateral flexion

Erector Spinae iliocostalis Peripheral Innervation

Dorsal Rami

Erector Spinae iliocostalis Spinal Innervation

Cervical (lower), thoracic, and lumbar spinal nerves

Splenius Attachments

Spinous processes of cervical (C6-C7) and thoracic vertebrae, nuchal ligament

Transverse processes of cervical vertebrae, temporal bone (mastoid process), occipital bone (C1-C3)

Splenius Action

Bilateral: neck extension, head extension

Unilateral: neck rotation, neck lateral flexion, head rotation

Splenius Peripheral Innervation

Dorsal Rami

Splenius Spinal Innervation

Cervical spinal nerves

sternocleidomastoid attachments

Anterior manubrium, medial 1/3 of clavicle

Mastoid process (temporal bone), occipital bone

sternocleidomastoid actions

Bilateral: neck flexion

Unilateral: neck lateral flexion, head rotation

sternocleidomastoid peripheral innervation

Spinal accessory nerve (CN XI) & ventral rami of C2-C4

sternocleidomastoid spinal innervation and *cranial

*Spinal accessory nerve (CN XI), C2-C4

Anterior scalene attachments

Anterior tubercles of cervical vertebrae

Rib 1

Anterior scalene actions

Bilateral: neck flexion

Unilateral: neck lateral flexion, neck rotation

Anterior scalene peripheral innervation

Ventral rami of C4-C6

Anterior scalene spinal innervation

C4-C6

Middle scalene attachments

Transverse processes of cervical vertebrae

Rib 1

Middle scalene actions

Unilateral: neck lateral flexion

Middle scalene peripheral innervation

Ventral rami of C3-C8

Middle scalene spinal innnervation

C3-C8

Omohyoid peripheral innervation

ansa cervicalis

omohyoid spinal innervation

C1-C3

Semispinalis capitis Attachments

transverse processes of thoracic vertebrae, Superior articular process of cervical vertebrae,

Occipital bone

Semispinalis capitis Actions

Bil: neck, head, trunk extension. Unil: neck, head, trunk rotation

Semispinalis capitis peripheral innervation

Greater occipital nerve & dorsal ramus of C3

Semispinalis capitis spinal innervation

C2-C3

Semispinalis cervicis attachments

transverse processes of thoracic vertebrae, spinous processes of cervical vertebrae

Semispinalis cervicis Actions

Bil: neck and trunk extension. Unil: neck and trunk rotation

Semispinalis cervicis Peripheral innervation

Dorsal Rami

Semispinalis cervicis spinal innervation

Lower cervical and upper thoracic spinal nerves

rectus capitis posterior minor attachments

posterior arch of C1, occipital bone

Rectus capitis posterior minor action

Bilateral: head extension

Rectus capitis posterior minor peripheral innvervation

Suboccipital nerve

Rectus capitis posterior minor spinal innervation

C1

Rectus capitis posterior major attachment

Spinous process of C2, Occipital bone

rectus capitis posterior major action

Bil: head extention. Unil: head rotation

Rectus capitis posterior major peripheral innervation

Suboccipital nerve

Rectus capitis posterior major spinal innervation

C1

obliquus capitis superior attachments

Transverse process of C1

Occipital bone

Obliquus capitis superior actions

Bil: head extension. Unil: head lateral flexion

Obliquus capitis superior peripheral innervation

Suboccipital nerve

Obliquus capitis superior spinal innervation

C1

obliquus capitis inferior attachments

Spinous process of C2

Transverse process of C1

obliquus capitis inferior action

Unilateral: head rotation

obliquus capitis inferior peripheral innervation

Suboccipital nerve

obliquus capitis inferior spinal innervation

C1