Question

After infratentorial surgery, where is the incision typically made?

a) Midline of the back

b) Behind the ear

c) At the nape of the neck

d) Across the abdomen

Answer 1

The typical incision site for infratentorial surgery is at the nape of the neck (Option C), which allows access to the brain's posterior fossa. The cranial cavity contains components of the central nervous system.

Step-by-step explanation:

After infratentorial surgery, which is surgery performed on the part of the brain located below the tentorium cerebelli, the incision is typically made at the nape of the neck.

This location provides the necessary access to the posterior fossa of the skull, where the cerebellum and brainstem are situated.

The incision allows surgeons to reach these areas without going through the thicker parts of the skull that cover the cerebrum.

The cranial cavity (option c from the review questions) is the cavity that contains a component of the central nervous system, specifically the brain.

The dura mater, as mentioned in the provided context, supports the central nervous system structures with its tent-like structure separating the occipital lobes and the cerebellum, and contains the venous sinuses.

Hence, the correct answer is Option C.

Answer 2

Infratentorial surgery typically involves an incision made behind the ear. Thus, the correct answer is b) Behind the ear.

Step-by-step explanation:

Infratentorial surgery refers to procedures performed on the lower part of the brain, situated below the tentorium—a membrane that separates the cerebrum from the cerebellum. The incision for such surgeries is typically made behind the ear. This area provides optimal access to the posterior fossa, where structures like the cerebellum, brainstem, and fourth ventricle are located.

The choice of incision location is crucial in ensuring minimal damage and maximum access during surgery. By making the incision behind the ear, surgeons can navigate through layers of tissue to reach the intended area while minimizing damage to surrounding structures. Additionally, this location offers a degree of concealment, aiding in post-operative recovery and cosmetic considerations.

Furthermore, this specific incision location allows for a more direct and efficient route to the infratentorial region, facilitating precise surgical interventions. The proximity to the surgical site and the familiarity of this approach for neurosurgeons contribute to its preference in infratentorial surgeries.

Ultimately, the incision behind the ear stands as the preferred choice for infratentorial surgeries due to its strategic positioning, facilitating access to the target area while minimizing risks and optimizing patient outcomes.

Thus, the correct answer is b) Behind the ear.