Table 1.
Characteristics of the individuals involved in the study.
Fig 1.
(left) EEG headset used in the present study. (right) Example of 8 sec. electroencephalography (EEG) recordings of left (LH) and right (RH) hemispheres obtained with the EEG headset after removing artefacts in both horse populations (A- recreational horse; B riding school horse). LH wave for recreational horses are characteristic of slow waves.
Table 2.
Type, classification and description of recorded abnormal repetitive behaviours.
Table 3.
Individual EEG profiles correlations between the two recording sessions (Spearman correlations).
Table 4.
EEG activity recorded over the first session on the 18 horses.
Fig 2.
Relation between EEG power profile and postural indicators of spine state: median theta (A) and beta (B) proportion recorded in the left hemisphere according to the horse’s neck shape (as measured following Lesimple et al [22]’s method). Mann-Whitney test. ***p<0.001; **p<0.01; *p<0.05.
Fig 3.
Correlations between the proportions of the different waves in the quantitative resting- state EEG in each hemisphere and sEMG measures along the spine.
1 median value of the spine muscular activity; 2 the asymmetry median value along the spine. Only significant correlations are shown.
Fig 4.
Relationship between resting state EEG power profile and sEMG measures at different sites along the horse’s spine.
(A) Correlations between the proportion of each wave type in the left (LH) or right (RH) hemisphere and sEMG measures at each spine site; (B) representation of the different sEMG recording sites along the spine (C = cervical, T = thoracic, S = sacral).