Methods and systems are provided for monitoring neuromuscular blockade in patients during surgical procedures. In one embodiment, a system includes a stimulator, an electromyography (EMG) sensor, a kinemyography (KMG) sensor, and a single connector configured to couple each of the stimulator, the EMG sensor, and the KMG sensor to a patient monitoring device via a single input. In this way, neuromuscular transmission (NMT) monitoring in patient may be done reliably by ensuring that NMT measurement from a first sensor (EMG sensor) is in line with the measurement of the second sensor (KMG sensor).