Tectospinal tract

Tectospinal tract is a part of the central nervous system that contributes to the control of reflex postural movements in response to visual stimuli. It is one of the descending spinal tracts that carry motor instructions from the brain to the spinal cord.

Etymology

The term "tectospinal" is derived from the Latin words "tectum," meaning roof, and "spinalis," referring to the spine. This is because the tract originates in the tectum region of the brain and descends to the spinal cord.

Anatomy

The tectospinal tract originates in the superior colliculus of the tectum, an area in the midbrain responsible for visual reflexes. From there, it descends through the brainstem, crossing over to the opposite side at the level of the midbrain. It then continues down into the spinal cord, where it primarily terminates in the cervical region. This tract is involved in mediating reflex postural movements, particularly in response to visual stimuli.

Function

The primary function of the tectospinal tract is to mediate reflex postural movements in response to visual stimuli. It is involved in the coordination of head and eye movements, particularly in response to bright lights or moving objects. This tract also plays a role in the reflexive turning of the head towards a stimulus.

Clinical significance

Damage to the tectospinal tract can result in a variety of neurological symptoms, including difficulties with balance and coordination, abnormal eye movements, and impaired reflexes. It can be caused by a variety of conditions, including stroke, traumatic brain injury, and multiple sclerosis.

Related terms

• Central nervous system
• Descending spinal tracts
• Superior colliculus
• Tectum
• Reflex

See also

• Medial longitudinal fasciculus
• Rubrospinal tract
• Vestibulospinal tract

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