In one embodiment, a neurological status evaluation apparatus includes a signal generator configured to generate an electromagnetic signal at one or more frequencies, a transmitting antenna coupled to the signal generator and configure to transmit the electromagnetic signal, and a receiving antenna positioned proximate to the transmitting antenna such that an evaluation space is defined between the transmitting antenna and the receiving antenna. The biological tissue under evaluation does not contact the transmitting antenna or the receiving antenna. The receiving antenna receives a modulated electromagnetic signal after propagating through the biological tissue under evaluation. The neurological status evaluation apparatus further includes a spectrum analyzer coupled to the receiving antenna, wherein the spectrum analyzer receives and samples the modulated electromagnetic signal. A computing device is coupled to the spectrum analyzer, calculates an evaluation, and provides a neurological status indicator of the biological tissue under evaluation based on the evaluation parameter.