tegmental decussations

teg·men·tal de·cus·sa·tions

1. the posterior tegmental decussation [TA] (dorsal tegmental decussation [TA], fountain decussation, Meynert decussation) is formed by the crossing of the left and right tectospinal and tectobulbar tracts;

2. the anterior tegmental decussation [TA] (ventral tegmental decussation [TA], Forel decussation) is formed by the crossing of the left and right rubrospinal and rubrobulbar tracts; both decussations are located in the mesencephalon.

Synonym(s): decussationes tegmentales [TA]

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teg·men·tal de·cus·sa·tions

(teg-men'tăl dē'kŭs-ā'shŭnz)

1. The dorsal tegmental decussation (fountain or Meynert decussation, decussatio fontinalis) of the left and right tectospinal and tectobulbar tracts.

2. The ventral tegmental decussation (rubrospinal or Forel decussation) of the left and right rubrospinal and rubrobulbar tracts; both are located in the mesencephalon.
Synonym(s): decussationes tegmenti.

Medical Dictionary for the Health Professions and Nursing © Farlex 2012