A frontal section through the medulla of the Macacus rhesus monkey at a level near the upper tip of the nucleus of Burdach reveals a small area situated dorsal to the remnant of the nucleus of Burdach and dorsomedial to the area ovalis of the restiform body. This area is well seen in preparations stained with Weigert's myelin sheath stain. Study with various methods, however, reveals that the area consists of a complex mixture of nerve cells and nerve fibers. Figure 1 shows this area near its caudal extremity, as demonstrated by the Weigert stain. In frontal sections more cephalad, the area increases in size and takes up a position medial and dorsomedial to the restiform body. In these more cephalad sections the cellular content of this area is seen to increase markedly. At a level near the entrance of the eighth nerve the area has become very large. Figure
FERRARO A, BARRERA SE. EFFECTS OF LESIONS OF THE JUXTARESTIFORM BODY (I.A.K. BUNDLE) IN MACACUS RHESUS MONKEYS. Arch NeurPsych. 1936;35(1):13–29. doi:10.1001/archneurpsyc.1936.02260010023002
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