Folds of Dura Mater

Question 1

Enumerate dural folds

Answer 1

• Falx cerebri
• Falx cerebelli
• Tentorium cerebelli
• Diaphragma sellae

Question 2

Falx cerebri shape, site, attachements & contents

Answer 2

• Shape: sickle shaped
• Site: duplicated between the 2 cerebral hemispheres

Attachements:
1. Apex: attached to crista galli & frontal crest
2. upper border: attached to superior saggital groove, containing Superior saggital sinus
3. Lower border: free containing inferior saggital sinus
4. Base: attached to tentorium cereblli, contains straight sinus

Question 3

Tentorium cerebelli site

Answer 3

Site: seperates cerebellum from occipital lobe of cerebrum

Question 4

Tenotrium cerebelli attachement

Answer 4

• Posterior clinoid process of sphinoid bone (ant.)
• Superior petrous sulcus of temporal bone (side)
• transverse sulcus (post.)

Question 5

Nerves peirceing crossing of attached & free surfaces of Tentorium cerebelli

Answer 5

3,4,5 CN
* Oculomotor N (in front of point)
* Trochlear N (at the point)
* Trigeminal N (behind the point)

Question 6

Sinuses related to tentorium cerebelli

Answer 6

• Straight sinus (at its attachement with falx cerebri)
• Transverse sinus
• Superior petrosal sinus

Question 7

Site of falx cerebelli

Answer 7

from internal occipital protuberence to foramen magnum, seperating the two cerebellar hemispheres

Question 8

Diaphragma sellae covers ___

Answer 8

dural fold covering sella turcica & pituitary gland