| Neuronal fiber composition of the corpus callosum within some odontocetes. | |
| | |
MedLine Citation:
|
PMID: 18493931 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Odontocetes (toothed whales) evolved from terrestrial mammals approximately 55 million years ago and have since remained on a unique evolutionary trajectory. This study used formalin-fixed tissue and light microscopy to quantify the size and number of fibers along the corpus callosum of the bottlenose dolphin (n = 8). Two other species, the Amazon River dolphin (n = 1) and the killer whale (n = 1), were included for comparison. A large amount of variation in the shape and area of the corpus callosum was observed. The odontocete corpus callosum is a heterogeneous structure with variation in fiber size and density along the length of the corpus callosum in all specimens examined. Using the species with the largest sample size, the bottlenose dolphin, comparisons by sex and age (sexually mature verses immature) were made for the area of the corpus callosum, five subregions, and fiber densities. Although no sex differences were detected, age appeared to affect the size, shape, and fiber composition of the bottlenose dolphin corpus callosum. |
| | |
Authors:
|
Mandy J Keogh; Sam H Ridgway |
Publication Detail:
|
Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
|
Title: Anatomical record (Hoboken, N.J. : 2007) Volume: 291 ISSN: 1932-8494 ISO Abbreviation: Anat Rec (Hoboken) Publication Date: 2008 Jul |
Date Detail:
|
Created Date: 2008-06-23 Completed Date: 2008-08-21 Revised Date: 2009-12-16 |
Medline Journal Info:
|
Nlm Unique ID: 101292775 Medline TA: Anat Rec (Hoboken) Country: United States |
Other Details:
|
Languages: eng Pagination: 781-9 Citation Subset: IM |
Copyright Information:
|
(c) 2008 Wiley-Liss, Inc. |
Affiliation:
|
San Diego State University, Biology Department, San Diego, California, USA. mandy_keogh@alaskasealife.org |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Animals Bottle-Nosed Dolphin / anatomy & histology Cetacea / anatomy & histology* Corpus Callosum / anatomy & histology*, ultrastructure Dolphins / anatomy & histology Evolution Female Male Nerve Fibers / ultrastructure Species Specificity Whale, Killer / anatomy & histology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Evaluating the differential roles of the dorsal dentate gyrus, dorsal CA3, and dorsal CA1 during a t...
Next Document: Vibration causes acute vascular injury in a two-step process: vasoconstriction and vacuole disruptio...