Dura Mater

Dura Mater

Question 1. Duramater
Answer:

• It is the outermost, thickest & toughest membrane covering the brain

Layers:

1. Outer / Endosteal layer

• Serves as endosteum for the skull bones
• It is richly vascular

2. Inner/Meningeal layer

• Surrounds the brain
• It is folded to divide the cranial cavity into compartments
• It is more fibrous & requires little blood supply

“Understanding the dura mater through FAQs: Anatomy, functions, and uses explained”

Question 2. Falx cerebelli
Answer:

• It is small sickle shaped fold of duramater
• It projects into the posterior cerebellar notch

“Importance of studying the dura mater for medical students: Questions explained”

Question 3. Straight sinus
Answer:

• It lies within the junction of the falx cerebri & the tentorium sellae
• It is formed by the union of the inferior Sagittal sinus with the great cerebral vein
• Here exists a ball valve mechanism formed by sinusoidal plexus of blood vessels
• This regulates the secretions of CSF
• It ends at the internal occipital protuberence

Question 4. Transverse sinus
Answer:

• They are paired large sinuses
• They are situated in the posterior part of the attached margin of the tentorium cerebelli
• The right transverse sinus is continuation of the superior sagittal sinus & left sinus is continuation of the straight sinus

“Common challenges in mastering dura mater notes effectively: FAQs provided”

Extend:

• From the internal occipital protuberence to the posteroinferior angle of the parietal bone

Tributaries:

• Diploic vein
• Superior petrosal sinus
• Inferior cerebral vein
• Inferior cerebellar vein
• Inferior anastomic vein

“Factors influencing success with dura mater studies: Q&A”

Question 5. Sigmoid sinus
Answer:

• It is paired S-shaped sinus
• It is direct continuation of the transverse sinus

Extend:

• From the posteroinferior angle of the parietal bone to the posterior part of the jugular foramen

Tributaries:

• Mastoid & Condylar emissary vein
• Cerebellar vein
• Internal auditory vein