anatomy of suboccipital triangle, bounaries roof and floor of the suboccipital triangle, contents of the triangle, cervical plexus, muscular andd sensory branches of cervical plexus

1. BACK OF NECK
DR SANA YASEEN
Anatomy department

2. Layers:
•Skin
•Superficial fascia
•Trpezius
•Splenius capitis
•Semispinalis capitis

3. BOUNDARIES :
SUPEROMEDIALLY: rectus
capitis posterior major
SUPEROLATERALLY:
superior oblique muscle
INFERIORLY: Inferior
oblique
ROOF:
a) Medially: semispinalis capitis
b) Laterally: longissimus capitis , occ
splenius capitis
FLOOR:
a. Posteriorly arch of atlas
b. Posterior atlanto-occipital membrane

5. CONTENTS:
1. Third part of vertebral artery
2. Dorsal ramus of C1 (sub occipital nerve)
3. Sub occipital plexus of veins

8. CERVICAL PLEXUS
The cervical plexus is a network of nerve fibres that supplies
innervation to some of the structures in the neck and trunk.
It is located in the posterior triangle of the neck, halfway up
the sternocleidomastoid muscle, and within the prevertebral
layer of cervical fascia.
The plexus is formed by the anterior rami (divisions) of
cervical spinal nerves C1-C4.

9.  The nerves arising from the cervical plexs can
broadly be divided into two groups –
muscular branches and sensory branches.