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MUSCLES OF BACK &SUBOCCIPITAL TRIANGLE
DR VANI PC
Above-External occipital protuberance
& superior nuchal line
below – Spine of c7 vertebrae
Back of Neck-Extent
The back of neck consists of four layers
Skin
Superficial fascia
Deep fascia
Muscles
Back of Neck-Layers
Back of neck- skin
Back of neck- superficial fascia
The cutaneous nerves
Greater occipital
Third occipital
The cutaneous vessels
Occipital artery
Twigs of vertebral artery
Muscles are arranged
as
Superficial group
Deep Group
Back of neck- Muscles
SUPERFICIAL GROUP
First layer - Trapezius
Second layer – Levator scapulae
DEEP GROUP
Superficial : Splenius Capitis, Splenius
Cervices
Intermediate : Longissimus Capitis
Deep : Semispinalis Capitis
Deepest layer : Suboccipital muscles
SUBOCCIPITAL MUSCLES
Rectus capitis posterior minor
Rectus capitis posterior major
Obliquus capitis inferior
Obliquus capitis superior
SUBOCCIPITAL TRIANGLE
Approach to Suboccipital triangle
Superomedially : Rectus capitis posterior
major & minor
Superolaterally : Obliquus capitis
superior
Inferiorly : Obliquus capitis inferior
Boundaries
Roof:
Semispinalis capitis
Floor:
Posterior atlanto-occipital
membrane
Posterior arch of atlas
Boundaries
Suboccipital nerve:
(Dorsal ramus of C1)
III part of Vertebral artery
Sub occipital venous plexus
Contents
Cisternal puncture
It is a procedure to approach cisterna magna in the posterior cranial fossa through the foramen magnum
To obtain CSF
Via the Suboccipital triangle
By piercing the posterior atlanto-occipital membrane
Applied aspects