The trigeminal lemniscus or the trigeminothalamic tracts is a somatosensory tract containing second-order neuron fibers of the trigeminal system. It consists of the ventral and dorsal trigeminal tracts.

The trigeminal lemniscus is a nerve pathway that transmits sensory information from the face to the main sensory trigeminal nucleus in the pons, allowing for the perception of touch, pressure, and other sensations in the facial region.

2023年6月5日 · Other fibers within the main nucleus travel toward the thalamus forming the dorsal trigeminothalamic tract. The ventral and dorsal tracts coalesce in the area of the pons adjacent to the midbrain and are collectively known as the trigeminal lemniscus tract.

The trigeminal lemniscus, also known as the trigeminothalamic tract, consists of the second-order neurons within the trigeminal sensory system. These neurons convey general somatic sensory information—such as pain, temperature, touch, pressure, and vibration—from the trigeminal sensory nuclei in the brainstem to the ventral posterior medial ...

2023年1月30日 · The transverse section at the middle cerebellar peduncle shows the trapezoid body, medial lemniscus, lateral lemniscus, and trigeminal nucleus (sensory and main motor). Pontine structures at the level of the facial nucleus are the abducens nerve nucleus, facial nerve nucleus, and vestibular nuclei.

The second-order neurons of the trigeminal brainstem nuclei give off axons that cross the midline and ascend to the ventral posterior medial (VPM) nucleus of the thalamus by way of the trigeminothalamic tract (also called the trigeminal lemniscus).

The trigeminal lemniscus terminates laterally in the ventral posterior medial nucleus, whereas the medially-located parvocellular division receives gustatory input from the solitary nucleus.

The principal sensory (PrV) nucleus-based trigeminal lemniscus conveys whisker-specific neural patterns to the ventroposteromedial (VPM) nucleus of the thalamus and subsequently to the primary somatosensory cortex.

Trigeminal (STr and TTh (dashed red arrow)), anterolateral (AL) and medial lemniscus (ML) (green arrow) system pathways traverse the brainstem in parallel between the spinal cord and thalamus. Ventral TTh (trigeminal lemniscus) and dorsal TTh tracts are jointly denoted as TTh.

The trigeminal lemniscus 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.