Figure 5From: Monitoring of pre-frontal oxygen status in helicopter pilots using near-infrared spectrophotometersThe oxy-hemoglobin (O 2 Hb) and deoxy-hemoglobin (HHb) changes and position of the aircraft during an approach to the top of the mountain in pilot A with the BK117. Upper part: flight course and aircraft position, lower part: the NIRS data. The outline arrow indicates the downward head movement of the pilot (bold: 2~3 seconds, thin: 1~2 seconds).Back to article page