In surgery that uses the stereotaxic instrument,
A) the head holder is designed to fix the skull in a rigid position.
B) the carrier arm can be manipulated in two dimensions.
C) stereotaxic surgery does not require coordinates from a brain atlas.
D) the procedure is limited to the creation of brain lesions.
E) Stereotaxic surgery is limited to animals.

Question

Quizplus · Accepted Answer

The head holder is an essential component of the stereotaxic instrument as it fixes the skull in a rigid position, preventing any movement during the surgery.

Answer: B
 The carrier arm in the stereotaxic instrument can be manipulated in two dimensions (up-down and left-right), allowing for precise targeting of specific brain regions.

Answer: D
 Although stereotaxic surgery has been used historically for creating brain lesions, it is not limited to that function. It can also be used for a range of other surgical procedures, including implantation of cannulas or electrodes, injection of drugs, and tissue biopsies.

Therefore, the best choices are A and B.

In Surgery That Uses the Stereotaxic Instrument