[TA] small groups of neurons associated with the trapezoid body, forming the lateral nucleus of trapezoid body [TA] (nucleus lateralis corporis trapezoidei [TA]), medial nucleus of trapezoid body [TA] (nucleus medialis corporis trapezoidei [TA]), and the anterior nucleus of trapezoid body [TA] or ventral nucleus of trapezoid body [TA] (nucleus anterior corporis trapezoidei [TA]). These indistinct cell groups are involved in the relay of auditory input. SYN: nuclei corporis trapezoidei [TA].