Indications • Lesions in the cerebellopontine angle and petroclival region can be surgically challenging to resect because of surrounding vascular and eloquent neural structures (i.e., brainstem) that have zero tolerance…
Indications • This technique is preferred for lesions of the middle fossa (i.e., cavernous sinus, medial temporal lobe, tentorial region, petrous bone, incisura) and posterior fossa (i.e., extraaxial lesions in…
Indications • Treatment option in temporal lobe epilepsy for patients in whom anticonvulsant medications do not control epileptic seizures • Techniques for removing temporal lobe tissue, such as in anterior…
Indications • The occipital craniotomy is a versatile approach that provides access to the occipital lobes; tentorium; torcular Herophili; transverse sinus; sigmoid sinus; and tumors, vascular malformations, or other lesions…
Nerve roots, as well as related motor, sensory, and sympathetic axons, were examined at their origins in the subarachnoid space and along their exits through the intervertebral foramina. Four cross-sectional…
Anatomy The lumbar plexus, composed of the ventral rami of the L1–L4 spinal nerve roots, travels into and is formed within the body of the psoas major muscle, coalescing to…
The posterior 1 surgery (▶ Fig. 17.1) is a paraspinal approach that was originally described as an alternative conduit to the lumbar spine. It went between the lateral board of…
Magnetic resonance neurography (MRN) is a recent addition to the set of tools for the assessment of the lumbar plexus (LP) and peripheral nerves. The objective of this chapter is…
Anatomy Spinal nerves originate in the spinal column as a set of ventral and dorsal rootlets. Emerging from the spinal cord, these rootlets converge to form the ventral and dorsal…
There are various proposed models that mark the distributions for these dermatomes. As such, significant variations exist in the literature. In this chapter, we will briefly describe the general map…
