DOI: 10.5522/04/24297766.v1
title: sEMG of Swallowing, Coughing and Speech

description: Dataset for in-progress manuscript by the associated authors. <br> <strong>Data Summary:</strong> <br> Dataset consists of 3-channel surface electromyography (sEMG) recorded from under the chin (submental muscles) and chest (intercostal and diaphragm muscles) from 11 study participants (8 control, 3 throat cancer). <br> Each participant attended 4 sEMG recording sessions, each session consisting of the following: 15 swallows (5 dry, 5 water, 5 banana). 3 cough recordings, each recording comprising 5 coughs. 3 speech recordings, each comprising 10 spoken sentences from the Harvard sentences (IEEE, "IEEE Recommended Practice for Speech Quality Measurements," IEEE Trans. Audio Electroacoust., vol. 17, no. 3, pp. 225-246, 1969). 6 movement recordings comprising the actions of standing, walking, reaching, twisting and sitting. 1 baseline recording, participant remained still for 60 seconds while baseline signals were recorded. Sound was recorded concurrently during swallow and speech recordings using a contact microphone placed over the cricoid cartilage. Pneumotachometry (airflow) was recorded during coughing. <br> <strong>Data Folders and File Notes:</strong> <br> Dataset contains both raw and processed data (signals have been normalized to baseline recording and excessive artefacts removed). <br> 1 folder exists per session: "P1_S1" corresponds to Participant 1 Session 1 data. <br> 1 .csv file exists per recording. From left to right .csv columns correspond to: Submental sEMG, Intercostal sEMG, Diaphragm sEMG, Pneumotachometry, Contact Microphone, Class Label. mV,mV,mV,cmH20,V,N/A (Units for raw data) <br> Class labels are as follows: 0 - Null (anything outside the other classes) 1 - Swallow phase 1 (preparation activity for swallowing such as chewing, sipping etc.) 2 - Swallow phase 2 (swallow reflex, larynx elevation following submental muscle contraction) 3 - Cough 4 - Speech <br> Movement recordings start with standing and end with sitting. The order of walking, twisting and reaching is randomised and summarised by the recording title e.g. "08_reach_twist_walk.csv" indicates an order of reach-twist-walk. <br> Files ending in "SW" indicate an out-of-protocol swallow took place e.g. participant swallowed during a cough recording. <br> Swallow files ending in "N2" or "N3" contain 2 or 3 swallows respectively. <br> &gt;1 baseline recording may exist in a session. If electrodes became detached during a session the baseline recording was repeated and subsequent recordings in the session normalised according to the latter baseline. <br> <strong>Hardware Setup:</strong> <br> Two submental electrodes (EL513, 10 mm diameter, BIOPAC Systems UK) were placed on the midline, posterior to the mental protuberance, with 20 mm interelectrode distance. <br> Three electrodes (EL503, 11 mm diameter, BIOPAC) were placed on the right 9th/10th intercostal space close to the anterior axillary line, with 35 mm interelectrode distance. The posterior two electrodes formed the intercostal recording dipole. The anterior electrode and a single electrode placed on the left 9th/10th intercostal space formed the diaphragm recording dipole. <br> Two reference electrodes (EL503) were placed on the midline over the sternum. <br> Two wireless EMG recorders (BIOPAC BN-EMG2 BioNomadix, 2,000 Hz sampling rate, 2,000× gain, 5 to 500 Hz bandpass filter) were placed at the waist and on the head to minimise relative cable length and motion artefacts. <br>