# A lateral hypothalamic region supporting diverse visual processing and modulation of visually-guided behaviour

## TL;DR

The lateral hypothalamus processes visual signals to regulate complex behaviors and responses to environmental threats.

## Contribution

The study reveals the lateral hypothalamus as a new region involved in processing visual information and modulating behavior.

## Key findings

- LHA neurons show diverse visual selectivity, including spatiotemporal contrast and motion signals.
- LHA has retinotopic organization and projects to brain regions controlling behavior.
- LHA modulates responses to visual stimuli like light flashes and looming objects.

## Abstract

Hypothalamic retinal input is traditionally considered distinct from the subcortical pathways supporting vision, specialised to adjust physiology and behaviour alongside variations in ambient illumination. Investigations of retinohypothalamic function have overwhelming focussed on the suprachiasmatic nucleus circadian clock, however. Here we employ multielectrode recording, viral tracing and chemogenetic manipulation in mice to show that another retinohypothalamic target, the anterior lateral hypothalamic area (LHA), displays diverse visual processing capabilities, supporting regulation of more complex visually-guided behaviours. Hence, while some visually responsive LHA cells track irradiance, a majority are highly selective for spatiotemporal contrast or motion signals. We further provide evidence for a retinotopic order to LHA visual responses, show that retinorecipient LHA neurons provide excitatory projections to behavioural control centres including the septal complex and habenula, and that LHA retinal inputs modulate behavioural responses to light flashes and ‘looming’ stimuli. Collectively, these data establish the LHA as a locus for regulation of visually-guided behaviours and environmental threat responses.

The accepted function of hypothalamic retinal input is regulation of daily rhythms in physiology and behaviour. Here authors show it also supports detection of form and motion and regulates visually-guided behaviours, via the lateral hypothalamus.