Figure 12.
Distribution of labeled terminals in the brainstem after cholera toxin subunit B conjugated with wheat germ agglutinin-horseradish peroxidase (B-HRP) was injected into the anterior chin ipsilateral to the DCL. (A) B-HRP injection sites. (B) In monkey SM-J (100% DCL), B-HRP-labeled terminals were primarily distributed in the trigeminal nucleus (Tri, white arrowheads) but slightly intruded into the cuneate nucleus (Cu; inset D). (C) In monkey SM-Y (65% DCL), B-HRP-labeled terminals were restricted to the Tri. No B-HRP labeled terminals were found in the Cu. (D) Photomicrograph showing the B-HRP labeled terminals in the Cu. Scale bars are 1 mm in B, C and 100 µm in D.