sensory root

Immediately adjacent to the sensory root, a smaller motor root emerges from the pons at the same level.

From the trigeminal ganglion, a single large sensory root enters the brainstem at the level of the pons.

In each vertebrate segment the 'reflex arc' is based upon two neurons: the afferent sensory root and the efferent motor root.

The sensory root carries general sensory fibers (GSA) that also do not synapse in the ganglion.

For instance, the sensory root fibers become myelinated before the motor; the upper branch of the vestibular nerve becomes myelinated before the lower.

They leave the ciliary ganglion in the sensory root of ciliary ganglion, which joins the nasociliary nerve.

In anatomy and neurology, the dorsal root (or posterior root) is the afferent sensory root of a spinal nerve.

It is connected by two or three short filaments with the nerve to the Pterygoideus internus, from which it may obtain a motor, and possibly a sensory root.

Cha ST, Eby JB, Katzen JT, Shahinian HK: Trigeminocardiac reflex: a unique case of recurrent asystole during bilateral trigeminal sensory root rhizotomy.

The motor root runs in front of and medial to the sensory root, and passes beneath the ganglion; it leaves the skull through the foramen ovale, and, immediately below this foramen, joins the mandibular nerve.

Direct infiltration of the nerve roots is also observed, mostly from the dorsal roots (the afferent sensory root of the spinal nerve) than the ventral roots (the efferent motor root of a spinal nerve).

Its sensory root is derived from two sphenopalatine branches of the maxillary nerve; their fibers, for the most part, pass directly into the palatine nerves; a few, however, enter the ganglion, constituting its sensory root.

The involvement of spinal reflexes in the genesis of muscular spasticity suggested its possible treatment by surgical interruption of the sensory branch of the thoracic and lumbar nerves (rhizotomy), and Foerster developed in 1908 an operation to cut the posterior sensory root in order to alleviate spasticity.