QS Study

The dura mater is the outermost layer of the meninges, lying directly underneath the bones of the skull and vertebral column. It is thick, tough and inextensible.

Blood supply of dura mater –

Inner layer: The inner layer of the dura mater is more fibrous and needs very little blood to nourish it.

Outer layer: The outer layer of the dura mater is lavishly vascular and gives nourishment to the adjacent bone.

(1) The vault:

Supplied by: Middle meningeal artery.

(2) Dura lining the anterior cranial fossa: by the meningeal branches of the ophthalmic, anterior and posterior ethmoidal arteries and a branch of the middle meningeal artery.

Supplied by: meningeal branches of –

  1. Anterior ethmoidal artery
  2. Posterior ethmoidal artery.
  3. Ophthalmic artery.

(3) Dura lining the middle cranial fossa, by the middle and accessory meningeal arteries and by the meningeal branches of the internal carotid and ascending pharyngeal arteries.

Supplied by:

  1. Middle meningeal artery.
  2. Accessory meningeal artery.
  3. Internal carotid artery.
  4. Meningeal branch of ascending pharyngeal artery.

(4) Dura lining the posterior cranial fossa, by the meningeal branches of the vertebral and occipital arteries.

Supplied by: a meningeal branch of

  1. Vertebral artery.
  2. Occipital artery.
  3. Ascending pharyngeal artery.

Dura Mater - Blood supply

Fig: Blood Supply of Dura Mater

Nerve supply of dura mater

Branches of the trigeminal, vagus, and the first three cervical spinal nerves and branches from the sympathetic trunk pass to the dura.

(A) The dura of the vault:

Supplied by: Ophthalmic division of trigeminal nerve.

(B) The dura of the floor –

(i) The anterior cranial fossa: by –

  • The anterior ethmoidal nerve.
  • Maxillary nerve.

(ii) The middle cranial fossa: by –

  • Maxillary nerve.
  • of Mandibular nerve.
  • Trigeminal ganglion.

(iii) The posterior cranial fossa: by –

  • Recurrent branch of C1,2,3,
  • Meningeal branch of 9th & 10th cranial nerves.
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