Neck

Functions:

• support • movement • transit-way for: -vessels -nerves -nourishment -air & infections between head & trunk

Cervical Vertebrae

1 2 1 1

3 4 5 6 7

Cervical Plexus

Deep Antero-lateral Neck Musculature

1=longus capitis 2=longus colli

1

3=anterior scalene 4=middle scalene 5=posterior scalene 2 3

45

Innervation: Ventral rami of cervical spinal NN.

Superficial Antero-lateral Neck Musculature

Sternocleidomastoid Innervation: Spinal XI

Supra and infrahyoids •suprahyoids: digastric, mylohyoid, geniohyoid, stylohyoid •infrahyoids: sternohyoid, omohyoid, sternothyroid innervation: branches of ansa cervicalis (cervical ventral rami) thyrohyoid innervation: N. to thyrohyoid (C-1 ventral rami fibers)

1

1. Trapezius innervation: Spinal XI

2

2. Splenius capitis innervation: dorsal rami, cervical spinal NN.

3

3. Semispinalis capitis innervation: dorsal rami, cervical spinal NN.

Sub-occipital region

4 4. Semispinalis cervicis innervation: dorsal rami of cervical spinal NN.

Sub-occipital Region

Sub-occipital Triangle

2

1 3

Innervation: subocicpital N.

Sub-occipital Triangle Boundaries: Medial: lateral side of rectus capitis posterior major Lateral: medial side of superior oblique Inferior: superior border of inferior oblique

Contents: • Posterior arch of atlas • Vertebral artery • Suboccipital N. (C-1 dorsal ramus)

External Carotid Artery and Its Branches

Superior thyroid Ascending Pharyngeal Lingual Facial Occipital Posterior Auricular Superficial Temporal Maxillary

External Carotid Artery and Its Branches

S uperior thyroid A scending Pharyngeal L ingual F acial O ccipital P osterior Auricular S uperficial Temporal M axillary

Course of the Internal Carotid and Vertebral Arteries

Clemente, 4th ed., Fig. 721

FASCIAL PLANES OF THE NECK