Fig. 1: Neurotechnological platform to capture hindlimb kinematics combined with untethered recordings of neural and muscle activity across a variety of locomotor tasks.
From: Regional specialization of movement encoding across the primate sensorimotor cortex
a We recorded kinematics of the right hindlimb using markers placed on the hindlimb anatomical landmarks. Additionally, only in Mk-Ek, we chronically implanted pairs of wire electrodes into major hindlimb muscles to record electromyographic (EMG) signals. We implanted Utah arrays into the hindlimb regions of the left dorsal premotor cortex (PMd), primary motor cortex (M1), and primary somatosensory cortex (S1) to record spiking activity of neural populations. Neural and EMG signals were broadcasted wirelessly via two wireless data transmission modules that were connected to the skull-mounted connectors during recordings. b We trained two monkeys (Mk-Ek and Mk-Nt) to walk across a corridor, a horizontal ladder, a staircase and over obstacles; and to walk on a treadmill moving at 3 km/h.
