What does the Trigeminothalamic tract do?
The trigeminal lemniscus, also called the trigeminothalamic tract, is composed of the ventral trigeminal tract, and the dorsal trigeminal tract – nerve tracts that convey tactile, pain, and temperature impulses from the skin of the face, the mucous membranes of the nasal and oral cavities, and the eye, as well as …
How trigeminal lemniscus is formed?
The fibers arising from the main sensory nucleus and the rostral part of the spinal nucleus form the trigeminal lemniscus, which ascends with the medial lemniscus and projects to the ventral posteromedial nucleus (VPM) of the thalamus (Sessle, 1991).
Is the Trigeminothalamic tract ipsilateral?
The dorsal trigeminothalamic tract originates only from the principal nucleus of V and travels ipsilaterally to the thalamus.
What is the spinal lemniscus?
Spinal lemniscus. – the anterolateral system (anterior and lateral spinothalamic tracts). In older terminology, the anterior and lateral spinothalamic tracts remained discrete while ascending in the spinal cord.
Does Trigeminothalamic tract Decussate?
The axons of the main sensory trigeminal nucleus decussate and join the 2° spinal trigeminal afferents in the ventral trigeminothalamic tract. The axons of the trigeminal motor neurons exit the brain stem to innervate the muscle of the jaw.
What is lateral lemniscus?
The lateral lemniscus is a tract of axons in the brainstem that carries information about sound from the cochlear nucleus to various brainstem nuclei and ultimately the contralateral inferior colliculus of the midbrain.
What is the trigeminal lemniscus?
The trigeminal lemniscus, also called the trigeminothalamic tract, is a part of the brain that conveys tactile, pain, and temperature impulses from the skin of the face, the mucous membranes of the nasal and oral cavities, and the eye, as well as proprioceptive information from the facial and masticatory muscles.
Where is the trigeminothalamic pathway located?
The trigeminothalamic pathway is located near the medial lemniscus. Axons from the spinal trigeminal nucleus are also referred to as the (ventral) trigeminothalamic tract and fibers coming from the principal trigeminal nucleus join it in mid pons.
What is an analogous trigeminal nerve pathway?
An analogous trigeminal nerve pathway, the trigeminal lemniscus, serving the face, transmits sensory information to the main sensory trigeminal nucleus in the pons. Receptors associated with these pathways have small RFs and do not show much convergence.
What is the anatomy of the ventral trigeminal tract?
The ventral trigeminal tract, consisting of second order neuronal axons from the principal (chief sensory) nucleus and spinal trigeminal nucleus. These fibers cross the midline and ascend to the contralateral thalamus.