| Summary: | A1-E1: Nissl-stained transverse sections at the equivalent level of c-fos expressing cells illustrated by blue dots in salmon, parr. Schematic drawings illustrate the level of the section. A2-E2, A4-E4: The Nissl-stained cell populations of interest with a higher magnification. A3-E3, A5-E5 : c-fos expression at the same level and with the same high magnification. The overview illustrations (A1-E1) and the left sided tissues with c-fos expression (A3-E3, A5-E5) are presented by flipping the pictures, resembling a whole brain section. A3 : Expression in a dorsal ring in the left habenula (hab) and in ventral parts of the habenula. A5: c-fos expression in the suprachiasmatic nucleus (scn). B3: A cell group expressing c-fos just ventral to the caudal habenula. B5 : Expression in cells close to the third ventricle and in the magnocellular preoptic nucleus (pm). C3: Activated cells in the dorsal thalamus (thd) and ventral thalamus (thv) (posterior nucleus of thalamus) close to the third ventricle. C5 : Focus on the expression in dorsal thalamus (thd) where the expression was strongest. D3: Expression of c-fos in caudal parts of the thalamus. D5: In the hypothalamus, expression was seen in the anterior tuberal nucleus (nat) and lateral tuberal nucleus (nlt). E3: Cells expressing c-fos were also localized in the mesencephalic tectum (tect), longitudinal torus (tl) and semicircular torus (ts). E5: Expression in the nucleus of the lateral recess (nrl). Arrowheads indicate positive cells. Scale bars of 200 μm.
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