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Relationship of blood flow and metabolism to acoustic processing centers of the dolphin braina)
a)This work was presented at the 5th Animal Sonar Symposium, Kyoto, Japan, 14–18 September 2009.
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10.1121/1.3442572
/content/asa/journal/jasa/128/3/10.1121/1.3442572
http://aip.metastore.ingenta.com/content/asa/journal/jasa/128/3/10.1121/1.3442572
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Figures

Image of FIG. 1.
FIG. 1.

Time series of one slice from multiple PET volumes taken near the midpoint of the dolphin brain. The image was acquired over a period of 19 min (1140 s) and is presented in the axial plane.

Image of FIG. 2.
FIG. 2.

Axial slices through the brain of the dolphin consisting of registered and fused volumes from MRI and PET scans. The color intensified regions correspond to the regions of highest blood flow as demonstrated by the distribution and uptake of . The regions are statistically defined as those with energy greater than 3 standard deviations above the mean value calculated for the PET volume. (A) Slices through the cerebellum and posterior cerebral hemispheres. (B) Slices progressing through the remainder of the brain.

Image of FIG. 3.
FIG. 3.

Comparison of FDG and distribution and uptake in the dolphin brain. The left panels are images from an FDG PET scan registered and fused to an MRI scan obtained in the same dolphin. The right panels are images from an PET acquired in a different dolphin. (A) Comparison in the axial plane. (B) Near midline comparison in the sagittal plane. Note activity in the posterior parietal region and the cerebellum.

Image of FIG. 4.
FIG. 4.

Axial slices through the brain of the dolphin consisting of registered and fused volumes from MRI and FDG PET scans. The color intensified regions correspond to the regions off highest metabolic rate as demonstrated by the uptake of FDG. The regions are statistically defined as those with energy greater than 3 standard deviations above the mean value calculated for the PET volume. (A) Slices through the cerebellum and posterior cerebral hemispheres. (B) Slices progressing through the remainder of the brain.

Image of FIG. 5.
FIG. 5.

Summed object rendering of the dolphin brain (left panel). Tissues responsible for greater than 2 standard deviations above the mean FDG uptake were defined as a distributed “red” object within the brain. The brain rendering is presented in the orientation presented by Ladygina and Supin (1977) and Supin et al. (1978) in their localization of sensory projection zones in the dolphin brain. A recreation of the projection zones, reprinted from Ridgway (1986), is provided for comparison (right panel; cortex, cortex, cortex). The “red” on the brain demonstrates where the majority of the brain metabolic demand is distributed. The distribution correlates with the auditory and visual cortex.

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/content/asa/journal/jasa/128/3/10.1121/1.3442572
2010-09-03
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Relationship of blood flow and metabolism to acoustic processing centers of the dolphin braina)
http://aip.metastore.ingenta.com/content/asa/journal/jasa/128/3/10.1121/1.3442572
10.1121/1.3442572
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