Write short notes on :-
A. Fissure of Rolando.
B. Extra-ocular muscles.
C. Foetal skull.
D. Cavernous sinus.
Answers
Explanation:
AThe central sulcus, or fissure of Rolando, separates the frontal and parietal lobes, and the deeper lateral sulcus, or fissure of Sylvius, forms the boundary between the temporal lobe and the frontal and parietal lobes.
B. The extraocular muscles are the six muscles that control movement of the eye and one muscle that controls eyelid elevation (levator palpebrae). The actions of the six muscles responsible for eye movement depend on the position of the eye at the time of muscle contraction.
C. FETAL HEAD The skull is made up of the base of skull and the vault or cranium. The vault is made of occipital bone posteriorly, the two parietals at the sides ,and the temporal bones and frontal bones anteriorly. These bones at birth are thin,easily compressible and joined by membrane.
D. The cavernous sinus within the human head is one of the dural venous sinuses[1] creating a cavity called the lateral sellar compartment bordered by the temporal bone of the skull and the sphenoid bone, lateral to the sella turcica.
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Explanation: