449
Fig. 2 TH-ir in higher order auditory nuclei; blue is DAPI nuclear stain. ( a , b ) TH-ir fi bers and
terminals are abundant in the midbrain torus semicircularis (TS). ( a ) Horizontal section through
TS. Rostral is to the left, medial is top of the image. ( b ) Transverse section through auditory area
centralis of TS. Compact band of nuclei is the periventricular cell layer (Pe) of TS. ( c ) TH-ir projections and varicosities in the lateral (PGl) and medial (PGm) division of nucleus preglomerulosus. Image taken from same section shown in 4c . ( d ) TH-ir terminals in the compact (CPc) and
diffuse (CPd) divisions of the central posterior nucleus (auditory thalamus). Inset shows TH-ir
terminals on neurobiotin-fi lled cells ( red ) in CPc following a bilateral backfi ll of the saccular
branch of VIII. ( e ) A single TH-ir cell ( arrowhead ) together with dense TH-ir terminals in the
hypothalamic anterior tuberal nucleus (AT). ( f ) TH-ir terminals on neurobiotin-fi lled cells ( red ,
arrowheads ) in AT following a bilateral backfi ll of the saccular branch of VIII. AT is also part of
the descending vocal motor circuitry and contains reciprocal connections with CP. ( g ) TH-ir terminals are found intermixed with neurobiotin-fi lled afferents ( red ) from a saccular backfi ll in the
eminentia granularis. Scale bar in = 200 μm in a , 100 μm in b–e , 50 μm in f and g . From Forlano
et al. ( 2014 )
Neuroanatomical Evidence for Catecholamines as Modulators of Audition…
Fig. 2 TH-ir in higher order auditory nuclei; blue is DAPI nuclear stain. ( a , b ) TH-ir fi bers and
terminals are abundant in the midbrain torus semicircularis (TS). ( a ) Horizontal section through
TS. Rostral is to the left, medial is top of the image. ( b ) Transverse section through auditory area
centralis of TS. Compact band of nuclei is the periventricular cell layer (Pe) of TS. ( c ) TH-ir projections and varicosities in the lateral (PGl) and medial (PGm) division of nucleus preglomerulosus. Image taken from same section shown in 4c . ( d ) TH-ir terminals in the compact (CPc) and
diffuse (CPd) divisions of the central posterior nucleus (auditory thalamus). Inset shows TH-ir
terminals on neurobiotin-fi lled cells ( red ) in CPc following a bilateral backfi ll of the saccular
branch of VIII. ( e ) A single TH-ir cell ( arrowhead ) together with dense TH-ir terminals in the
hypothalamic anterior tuberal nucleus (AT). ( f ) TH-ir terminals on neurobiotin-fi lled cells ( red ,
arrowheads ) in AT following a bilateral backfi ll of the saccular branch of VIII. AT is also part of
the descending vocal motor circuitry and contains reciprocal connections with CP. ( g ) TH-ir terminals are found intermixed with neurobiotin-fi lled afferents ( red ) from a saccular backfi ll in the
eminentia granularis. Scale bar in = 200 μm in a , 100 μm in b–e , 50 μm in f and g . From Forlano
et al. ( 2014 )
Neuroanatomical Evidence for Catecholamines as Modulators of Audition…