Public health and social entrepreneurs as activators of equitable health ecosystems.

OBJECTIVES: To describe approaches that public health and social entrepreneurs take to address health equity, and identify strategies for equitable collaborations with these entrepreneurs. METHODS: We leveraged data from semi-structured interviews, conducted August to October 2022, with 20 public health and social entrepreneurs who focus on drivers of health and health equity. Two researchers employed content analysis, guided by a prior framework. RESULTS: To support health equity, public health and social entrepreneurs: center equity, critique biases, innovate for inclusion, engage translational expertise, catalyze capacity, and activate equitable systems. Equitable collaborations are supported by re-examining roles, de-conflicting organizational barriers, prioritizing representation, mitigating bias in generating evidence, and employing equitable capital. CONCLUSIONS: Public health and social entrepreneurs can uplift equity across health service design and delivery. More equitable collaborations can advance this work.

Feeling fooled: Texture contaminates the neural code for tactile speed.

Motion is an essential component of everyday tactile experience: most manual interactions involve relative movement between the skin and objects. Much of the research on the neural basis of tactile motion perception has focused on how direction is encoded, but less is known about how speed is. Perceived speed has been shown to be dependent on surface texture, but previous studies used only coarse textures, which span a restricted range of tangible spatial scales and provide a limited window into tactile coding. To fill this gap, we measured the ability of human observers to report the speed of natural textures-which span the range of tactile experience and engage all the known mechanisms of texture coding-scanned across the skin. In parallel experiments, we recorded the responses of single units in the nerve and in the somatosensory cortex of primates to the same textures scanned at different speeds. We found that the perception of speed is heavily influenced by texture: some textures are systematically perceived as moving faster than are others, and some textures provide a more informative signal about speed than do others. Similarly, the responses of neurons in the nerve and in cortex are strongly dependent on texture. In the nerve, although all fibers exhibit speed-dependent responses, the responses of Pacinian corpuscle-associated (PC) fibers are most strongly modulated by speed and can best account for human judgments. In cortex, approximately half of the neurons exhibit speed-dependent responses, and this subpopulation receives strong input from PC fibers. However, speed judgments seem to reflect an integration of speed-dependent and speed-independent responses such that the latter help to partially compensate for the strong texture dependence of the former.