tectospinal

This bundle runs down partly through the red nucleus, in the formatio reticularis, ventral to the posterior longitudinal bundle of the mid-brain, pons and medulla oblongata into the ventral funiculus of the spinal cord where it is known as the tectospinal fasciculus.

IX. Neurology. 4e. Composition and Central Connections of the Spinal Nerves 1918

The fibers of the tectospinal tract end by collaterals and terminals either directly or indirectly among the motor cells in the anterior column of the spinal cord.

IX. Neurology. 4e. Composition and Central Connections of the Spinal Nerves 1918

The tectospinal fasciculus arises from the superior colliculus of the roof (tectum) of the mid-brain.

IX. Neurology. 1F. Pathways from the Brain to the Spinal Cord 1918

Its fibers are intermingled with the ascending spinothalamic fasciculus, with the anterior proper fasciculus and laterally with the tectospinal fasciculus.

IX. Neurology. 1F. Pathways from the Brain to the Spinal Cord 1918

Some of the fibers of the tectospinal fasciculus pass through the red nucleus giving off collaterals to it, others are given off to the motor nuclei of the cranial nerves and in the spinal cord they terminate either directly or indirectly by terminals and collaterals among the nuclei of the anterior column.

IX. Neurology. 1F. Pathways from the Brain to the Spinal Cord 1918

Their termination is unknown, but they probably constitute an auditory reflex path to the lower motor centers, perhaps descending into the spinal cord with the tectospinal fasciculus.

IX. Neurology. 4e. Composition and Central Connections of the Spinal Nerves 1918

The ventral longitudinal bundle consists for the most part of the tectospinal fasciculus, and arises from the superior colliculus, the fibers arch ventrally around the central gray matter and cross the midline in the fountain-decussation of Meynert.

IX. Neurology. 4b. The Mid-brain or Mesencephalon 1918

This nucleus undoubtedly receives many reflex fibers from various sources, i. e., from the superior colliculus via the ventral longitudinal bundle (tectospinal fasciculus) for optic reflexes; from the inferior colliculus via the auditory reflex path; and indirectly from the terminal sensory nuclei of the brain-stem.

IX. Neurology. 4e. Composition and Central Connections of the Spinal Nerves 1918

The abducens nucleus probably receives collaterals and terminals from the ventral longitudinal bundle (tectospinal fasciculus); fibers which have their origin in the superior colliculus, the primary visual center, and are concerned with visual reflexes.

IX. Neurology. 4e. Composition and Central Connections of the Spinal Nerves 1918

The tectospinal fasciculus which comprises the major part of the ventral longitudinal bundle passes down through the tegmentum and reticular formation of the pons and medulla oblongata ventral to the medial longitudinal bundle.

IX. Neurology. 1F. Pathways from the Brain to the Spinal Cord 1918