REMs per 30 second epoch and Ambient Temperature vs Time of Day in Hours in 6 C. medius studied in the wild in Madagascar.

<p>The top panel of the figure represents data from the animal documented to be in torpor with metabolic measurement. Note: the periods where EEG data were available for each animal coincides with the time-points where Ambient Temperature data is included in the graphs. Graphs a-f depict these data for Lemurs 1–6 respectively as designated in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0069914#pone-0069914-t001" target="_blank">Table 1</a>. Note: Because we have plotted a data point for every 30 second period over the roughly 4 days of data depicted, data from adjacent 30 second epochs which have the same or nearly the same value will appear to be on top of each other.</p

Data from recordings carried out for a torpid C.

<p>medius studied in the Duke Lemur Center. Simultaneous EEG, Temperature and Metabolic Rate recordings were obtained. a. Ambient Temperature, Skin Temperature, and Metabolic Rate vs Time of Day in Hours. Arousal from torpor is evident at approximately 13.5 hours. b. State (derived from visual scoring of the data in 30 second epochs) and Metabolic Rate vs. Time of Day in Hours.</p

Statistical Analysis of Relationships of EEG Activity to REMs, Metabolic Rate, and Temperature in 7 Animals Recorded During Torpor.

*<p>p<0.05;</p>**<p>p<0.01;</p>***<p>p<0.0001 For Difference between REM Epochs and Epochs Other Than REM; DLC = Duke Lemur Center;</p>‡<p>Only 2 REM epochs were included in these analyses.</p

Four 30 second segments of EEG Data.

<p>A. Two segments of data recorded in non-torpid sleep in Duke Lemur Center. The top segment displays EEG data during a period of REM sleep. The display scale is 250 µV from the top to the bottom. The bottom segment displays EEG data during a period of Non-REM sleep. The display scale is 150 µV from the top to the bottom. b. Two 30 second segments of EEG data recorded during torpor in the wild verified by decreased metabolic rate. The top segment includes REMs. The display scale is 250 µV from the top to the bottom. The bottom segment is typical monotonous very low-voltage activity seen through much of these recordings and the display scale is 75 µV from the top to the bottom.</p