Abstract:
:The muscles that effect lung ventilation are key to understanding the evolutionary constraints on animal form and function. Here, through electromyography, we demonstrate a newly discovered respiratory function for the iliocostalis muscle in the American alligator ( Alligator mississippiensis). The iliocostalis is active during expiration when breathing on land at 28°C and this activity is mediated through the uncinate processes on the vertebral ribs. There was also an increase in muscle activity during the forced expirations of alarm distress vocalizations. Interestingly, we did not find any respiratory activity in the iliocostalis when the alligators were breathing with their body submerged in water at 18°C, which resulted in a reduced breathing frequency. The iliocostalis is an accessory breathing muscle that alligators are able to recruit in to assist expiration under certain conditions.
journal_name
Biol Lettjournal_title
Biology lettersauthors
Codd JR,Rose KAR,Tickle PG,Sellers WI,Brocklehurst RJ,Elsey RM,Crossley DA 2nddoi
10.1098/rsbl.2019.0354subject
Has Abstractpub_date
2019-07-26 00:00:00pages
20190354issue
7eissn
1744-9561issn
1744-957Xjournal_volume
15pub_type
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