Hellishomar had not spoken directly to Lioren, even on the open channel, so that he had no way of knowing what was going through the patient’s mind. But Prilicla’s gauzy wings were beating slowly, and the stability of its hovering flight made it plain that there was no source of unpleasant emotional radiation in the area.
“Ease your mind, friend Lioren,” the empath said quietly. “At this time your anxiety is greater than friend Hellishomar’s.”
Greatly reassured, Lioren returned his attention on the main screen.
“This is the lobe where the highest concentration of trace metals occurs,” Conway said. “It has been chosen because similar traces have been associated with the telepathic function of the few other species known to possess the faculty, and although the operating mechanism remains unclear, the higher concentration of metal indicates the presence of an organic transmitter-receiver. It is the possible impairment of the patient’s higher brain functions, including the telepathic faculty, that we are trying to investigate and correct.
“Regrettably our charting of this area is imprecise,” it continued. “This is because the volume and density of the cranial contents would make it necessary to use very high power levels on our deep scanners, which would cause interference with neural activity.
“For this reason the portable, low-powered scanner will be used briefly and only in an emergency.
“The patient’s earlier cooperation in making voluntary muscle movements at our direction and submitting to external touch, pressure, and temperature stimuli has enabled us, by observing the local increases in neural activity, to identify those areas and eliminate them from the investigation. This information was obtained by sensor only, a detection system which produces no troublesome radiation, but which lacks the precision of the scanner.”
Lioren could not believe that there was anyone in the hospital, either presently on the staff or future trainees, who did not know the difference between a scanner and a sensor, and assumed that the explanation was for the patient’s benefit.
“It was expected,” Conway went on, “that the brain of a macro life-form would be more open and coarse-structured to correspond with its large body mass. As we can now see, the blood supply network is on the expected large scale, but the neural structure appears to be as highly condensed and finely structured as that of a being of smaller mass. I cannot … it is completely beyond rny ability to estimate the level of mentation possible to a brain of this size and complexity.”
Lioren stared at the enlarged image of Conway’s hands as they stretched slowly forward, pushed palms outward to each side, and then moved back out of sight, as if the Diagnostician was swimming endlessly through a fleshy ocean. For a moment he tried to put himself in Hellishomar’s place, but the thought of a white, slippery, two-headed insect crawling about in his brain was so repulsive that he had to control a sudden feeling of nausea.
Conway’s voice became uneven and its respiration more audible as it went on. “While we cannot be completely certain of what is or is not normal in this situation, it seems that the investigation so far has uncovered no evidence of structural abnormality or dysfunction. Our progress is being gradually impeded by increasing pressure from the fissure walls. At first this was ascribed to increasing fatigue in my arm muscles, but Seldal, who has no arms to tire, notes a similar increase in pressure against the outer surface of its carrying pouch. It is not thought to be a psychosomatic effect caused by claustrophobia.
“Mobility and the field of view are seriously reduced,” it added. “We are deploying the rings.”
Lioren watched as Conway struggled to pull the first ring over their heads and, with the help of Seldal’s incredibly flexible neck and beak, position it at waist level before breaking the compressed-air seal and inflating it around them. Two more rings were inflated at knee and shoulder level and joined into a hollow, rigid cylinder by longitudinal spacers. When the initial triple-ring deployment was complete, they added another ring and spacers to extend the structure forward. By deflating and withdrawing the rearmost ring and attaching it in front, and varying the lengths of the spacers, they were able to move the hollow cylinder and travel within it in any required direction. The open structure provided all-around visibility and ready access to perform surgery.