Prevertebral Fascia

Write a short note on prevertebral fascia.
Answer.

It is so called because it lies in front of the cervical part of the vertebral column.

Attachments

Superiorly: The base of the skull.

Inferiorly: Bodies of T3 and T4 vertebra.

Laterally: Merges with posterior lamina of investing layer of the deep cervical fascia enclosing trapezius muscle.

Features to remember

Forms the fascial carpet of the floor of the posterior triangle.
Cervical and brachial plexuses of nerves lie deep in it.
Forms axillary sheath, which extends into the axilla. (Note: The subclavian and axillary veins lie outside the sheath so that they can dilate during increased venous return from the limb.)

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