Fig. 9.
A: Hypothetical circuit involving the
auditory cortex, peripeduncular area (PPa), caudomedial (cm) striatum and
cholinergic and noncholinergic neurons in the caudal (c) globus pallidus in
rat. Heavy line on the right marks the putative cholinergic link. Other
connections of the PPa are indicated on the left, including those with auditory
subcortical relay stations (heavy lines). Data from Arnault and Roger (l987)
and LeDoux et al. (1990). Abbrev. ACe = central amygdaloid nucleus; AL =
lateral amygdaloid nucleus; CNf = cuneiform nucleus; DLL = dorsal nucleus of
the lateral lemniscus; IC = inferior colliculus; PAG = periaqueductal gray; PPT
= pedunculopontine tegmental nucleus; PRh = perirhinal cortex; VLL = ventral
nucleus of the lateral lemniscus; VMH = ventromedial hypothalamic nucleus; Zi =
zona incerta. B: Hypothetical circuit involving the insular cortex,
thalamic viscerosensory nuclei, parabrachial nucleus, nucleus of the solitary
tract, the central amygdaloid nucleus and cholinergic and noncholinergic
neurons in the SI in the rat. Hyphenated lines represent weaker
connections, heavy line the putative cholinergic link. Data from van
der Kooy et al. (l984), Shipley and Geinisman (l984), Cechetto and Saper
(l987), and Moga et al. (1990). Abbrev. PBl = lateral parabrachial
nucleus; PBm = medial parabrachial nucleus; VPLpc = parvicellular
ventroposterior lateral nucleus of the thalamus; VPMpc = parvicellular
ventroposterior medial nucleus of the thalamus.