5), but with reduced signal in adulthood find more ( Supplementary Fig. S5). FoxP1 was similarly expressed in layers V and VI, and also in layers II and III ( Fig. 5 and Supplementary Fig. S5). CNTNAP2 mRNA signal was observed in all layers from P0 to adulthood ( Fig. 5 and Supplementary Fig. S5). ROBO1 was expressed in layers II–VI at P0 ( Fig. 5), and layers III and V in adulthood ( Supplementary Fig. S5). ROBO1 was more highly expressed in layer V compared with other layers from P0 to adulthood ( Fig.

5 and Supplementary Fig. S5). KIAA0319 mRNA signal was observed in layers II–VI at P0 ( Fig. 5), but only a weak signal observed in layers V and VI in adulthood ( Supplementary Fig. S5). DCDC2 mRNA signal was observed Alectinib cell line in layer V at P0 and adulthood, although the signal was very weak ( Fig. 5 and Supplementary Fig. S5). In this study, expression patterns of human speech- and reading-related genes were examined at P0 and adulthood in the common marmoset brain by in situ hybridization. Reading is a cognitive function consisting of sensory perception, eye movements, language, and so on.

Dyslexic subjects can have abnormalities causing dysfunction in any of these processes (Ramus et al., 2003). Eye movements of dyslexic subjects during reading are different from those of age-matched control subjects. Specifically, dyslexic subjects show regressive saccades, unstable fixation, or long fixation durations (Bucci et al., 2012, Iles et al., 2000 and Jainta and Kapoula, 2011). We found that the dyslexia-related genes, ROBO1 and KIAA0319, and the SLI-related genes, CNTNAP2 and CMIP, are expressed in components of the visual pathway (including the SC, PBG,

and DLG) for oculomotor control ( Table 2). It has been reported that not only dyslexia-related genes, but also SLI-related genes, are associated with reading disabilities Inositol monophosphatase 1 ( Newbury et al., 2011). Therefore, our results suggest the possibility that oculomotor abnormalities may underlie reading disabilities in subjects with genetic variants of dyslexia- or SLI-related genes. The motor system is important for motor control, vocal learning, language acquisition, and speech. Speech is a possible external interface for language. We show that human speech- and reading-related genes are expressed in the basal ganglia, thalamus, and specific layers of the primary motor cortex (Table 2). Intriguingly, songbirds also possess a song circuit comprised of specific nuclei (analogous to the thalamocortical–basal ganglia circuit) for song learning and singing, which is considered to resemble aspects of vocal learning in human (Bolhuis et al., 2010, Brainard and Doupe, 2002 and Jarvis et al., 2005). Furthermore in songbirds, FoxP2 is expressed in the dorsal thalamus and striatum, including the song nucleus Area X (analogous to the basal ganglia) ( Haesler et al., 2004, Panaitof et al., 2010 and Teramitsu et al.