The Procedure For Craniotomy - Before the operation, all or part of the patient’s scalp is shaved. After a general anaesthetic has been given, layers of skin, muscle, and membrane are cut away from the skull at the planned operation site and the bone is cut with a saw (see below).
The “lid” of bone is then either folded back on a “hinge” of muscle or removed completely. The dura (the outermost of the three membranes that surround the brain) is then opened to reveal the inner membranes and the brain.
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