TY - JOUR T1 - An afferent white matter pathway from the pulvinar to the amygdala facilitates fear recognition JF - bioRxiv DO - 10.1101/277368 SP - 277368 AU - Jessica McFadyen AU - Jason B Mattingley AU - Marta I Garrido Y1 - 2019/01/01 UR - http://biorxiv.org/content/early/2019/01/09/277368.abstract N2 - Our ability to rapidly detect threats is thought to be subserved by a subcortical pathway that quickly conveys visual information to the amygdala. This neural shortcut has been demonstrated in animals but has rarely been shown in the human brain. Importantly, it remains unclear whether such a pathway might influence neural activity and behaviour. We conducted a multimodal neuroimaging study of 622 participants from the Human Connectome Project. We applied probabilistic tractography to diffusion-weighted images, reconstructing a subcortical pathway to the amygdala from the superior colliculus via the pulvinar. We then computationally modelled the flow of neural activity during a face-viewing task and found evidence for a functionally-afferent pulvinar-amygdala pathway. Critically, individuals with greater fibre density in this pathway also had stronger dynamic coupling and enhanced fearful face recognition. Our findings provide converging evidence for the recruitment of an afferent subcortical pulvinar connection to the amygdala that facilitates fear recognition. ER -