The spinocerebellar tracts transmit proprioceptive information to the cerebellum. Regarding the dorsal (posterior) spinocerebellar tract (DSCT) of Clarke's column:

• A It crosses the midline twice (once at entry level, once at brainstem) and enters the cerebellum via the superior cerebellar peduncle
• B It conveys conscious proprioception from the upper limb; fibers relay in the accessory cuneate nucleus and ascend in the lateral funiculus contralaterally
• C It carries unconscious proprioception from the lower limb; fibers originate in Clarke's nucleus (C8–L2), ascend ipsilaterally, and enter the cerebellum via the inferior cerebellar peduncle ✓
• D It originates from Golgi tendon organs only; muscle spindle afferents travel exclusively in the ventral spinocerebellar tract

Explanation

The dorsal spinocerebellar tract (Flechsig's tract) carries unconscious proprioception (from muscle spindles and Golgi tendon organs) of the ipsilateral lower limb. First-order neurons enter via dorsal roots and synapse in Clarke's nucleus (nucleus dorsalis, C8–L3). Second-order neurons ascend ipsilaterally in the dorsal part of the lateral funiculus and enter the cerebellum through the inferior cerebellar peduncle as mossy fibers. It does NOT cross the midline. The cuneo-cerebellar tract (accessory cuneate nucleus) is the equivalent for the upper limb. The ventral spinocerebellar tract (VSCT) does cross twice and enters via the superior cerebellar peduncle.

Reference: Guyton & Hall, Textbook of Medical Physiology, 14th ed.

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