Central tegmental tract

Central Tegmental Tract

The Central Tegmental Tract (CTT) is a neural pathway located in the brainstem that plays a crucial role in motor control and coordination. It is a part of the extrapyramidal system, which is responsible for regulating involuntary movements.

Anatomy

The CTT originates in the midbrain, specifically in the periaqueductal gray (PAG) and the adjacent deep mesencephalic nucleus. From there, it descends through the brainstem, passing through the pontine tegmentum and the medullary tegmentum. It terminates in the spinal cord, specifically in the ventral horn, where it synapses with lower motor neurons.

Function

The main function of the CTT is to transmit motor signals from the midbrain to the spinal cord. It is involved in the regulation of posture, balance, and locomotion. The CTT carries signals related to both voluntary and involuntary movements, making it an essential pathway for motor control.

Clinical Significance

Damage or dysfunction of the CTT can lead to various motor disorders. For example, lesions in the CTT can result in ataxia, a condition characterized by uncoordinated movements and difficulties with balance. Additionally, disruptions in the CTT have been implicated in certain movement disorders, such as Parkinson's disease.

Related Structures

The CTT is closely connected to other neural pathways involved in motor control. It receives inputs from the basal ganglia, which play a crucial role in the initiation and execution of movements. It also interacts with the corticospinal tract, another major pathway involved in motor control.

See Also

• Midbrain
• Brainstem
• Extrapyramidal System
• Periaqueductal Gray
• Basal Ganglia
• Corticospinal Tract
• Ataxia
• Parkinson's Disease

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  Midbrain at the level of the superior colliculus

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  Pons section at facial colliculus

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  Lower pons horizontal section

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  Central tegmental tract