Question

1. How do the dural sinuses form?
2. Explain habituation.
3. Define the reticular formation in one sentence.
4. What is a common feature of cranial nerves III, IV, & VI?
5. What functions are usually attributed to the right cerebral hemisphere?

Answer 1

Ans

The venous system of brain donot follow arteries of brain . Instead they drain into dural venous sinuses which ultimately drain I to the internal jugular vein .

The walls of these dural venous sinuses is formed by visceral periosteum and dural reflection .

Habituation is a learning in which an organism decrease or ceases its response to a stimulus after repeated or prolonged presentation .

Reticular formation is the cluster of neurons ( white matter ) that extends between cerebrum and brainstem that control over sensory functions .

Cranial nerves 3, 4 and 6 helps in movement of extra ocular muscles that is muscles of eyeball .

The right cerebral hemisphere controls left side of body and co ordinates with the rest of the body and perform task .