Understanding the neural basis of speech perception requires that we study the human brain both at the scale of the fundamental computational unit of neurons and in their organization across the depth of cortex. Here we used high-density Neuropixels arrays1–3 to record from 685 neurons across cortical layers at nine sites in a high-level auditory region that is critical for speech, the superior temporal gyrus4,5, while participants listened to spoken sentences. Single neurons encoded a wide range of speech sound cues, including features of consonants and vowels, relative vocal pitch, onsets, amplitude envelope and sequence statistics. Neurons at each cross-laminar recording exhibited dominant tuning to a primary speech feature while also containing a substantial proportion of neurons that encoded other features contributing to heterogeneous selectivity. Spatially, neurons at similar cortical depths tended to encode similar speech features. Activity across all corti
it avoided brainstem. so what do these parts of the brain do? this is the motor strip. this moves the right side of the body. it has probably been undercut. she s probably going to have some degree of paralysis or weakness or numbness on the right side. the language areas that we hear so much about are here and here. speech production and speech perception. that s what we don t know. are these areas damaged or not? their precise location in individuals can be variable. then there are other things we can expect to see. the frontal lobe here, a lot of this lobe is association cortex. it doesn t do anything specific in terms of movement or sensing pain or something like that. it s a place where connections are made.
structures at the core of the brain that are essential. so what do the parts of the brain do. well, this is the motor strip. this moves the right side of the body. this is sensory cortex here. so it s probably been undercut and she s probably going to have some degree of parral citizen or weakness or numbness on the right side. what we re hearing so much about are here and here. speech production and speech perception. that s what we don t know. are these areas damage order not? actually their presize locations, individuals can be variable. then there are other things we can expect to see. the frontal lobe here, a lot of this parietal lobe is called association cortex. so it doesn t do anything specific in terms of movement or sensing pain or something like that. it s a place where connections are made but it s important for