GPT Spinal Tracts Flashcards
(23 cards)
Where does the lateral corticospinal tract decussate?
In the medullary pyramids (lower medulla)
What is the origin and destination of the lateral corticospinal tract?
Origin: Motor cortex → Destination: Spinal cord anterior horn
Where does the dorsal column–medial lemniscus (DCML) tract decussate?
In the lower medulla (as internal arcuate fibers)
What is the origin and destination of the DCML tract?
Origin: Dorsal root ganglia → Destination: Thalamus → Sensory cortex
Where does the rubrospinal tract decussate?
In the midbrain (near the red nucleus)
What is the origin and destination of the rubrospinal tract?
Origin: Red nucleus → Destination: Cervical spinal cord
Where does the tectospinal tract decussate?
In the midbrain (dorsal tegmentum)
What is the origin and destination of the tectospinal tract?
Origin: Superior colliculus → Destination: Cervical spinal cord
Where does the lateral spinothalamic tract decussate?
Within 1–2 levels of spinal entry
What is the origin and destination of the lateral spinothalamic tract?
Origin: Dorsal horn → Destination: Thalamus → Sensory cortex
Where does the anterior spinothalamic tract decussate?
Within the spinal cord
What is the origin and destination of the anterior spinothalamic tract?
Origin: Dorsal horn → Destination: Thalamus
Where does the anterior corticospinal tract decussate?
At the spinal cord level (via anterior white commissure)
What is the origin and destination of the anterior corticospinal tract?
Origin: Motor cortex → Destination: Spinal cord anterior horn
Which spinal tract decussates twice?
The ventral spinocerebellar tract
Where does the ventral spinocerebellar tract decussate?
First in the spinal cord, then again in the cerebellum
What is the origin and destination of the ventral spinocerebellar tract?
Origin: Spinal border cells (L4–S3) → Destination: Cerebellum (ipsilateral)
Which spinocerebellar tract does not decussate?
The dorsal spinocerebellar tract
What is the origin and destination of the dorsal spinocerebellar tract?
Origin: Clarke’s nucleus (T1–L2) → Destination: Cerebellum (ipsilateral)
Does the vestibulospinal tract decussate?
No, it remains ipsilateral
What is the origin and destination of the vestibulospinal tract?
Origin: Vestibular nuclei → Destination: Ventral horn of spinal cord
Does the reticulospinal tract decussate?
No (mostly uncrossed)
What is the origin and destination of the reticulospinal tract?
Origin: Reticular formation → Destination: Spinal cord
