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Craniodental Anatomy Of A New Late Cretaceous Multituberculate Mammal From Udan Sayr, Mongolia., Amir Subhash Sheth
Craniodental Anatomy Of A New Late Cretaceous Multituberculate Mammal From Udan Sayr, Mongolia., Amir Subhash Sheth
Electronic Theses and Dissertations
Multituberculates were the longest-lived group of early mammals, with a nearly worldwide distribution, and a temporal range from the Middle Jurassic to the Late Eocene. Multituberculates are typically represented by isolated teeth and jaw fragments; however, several localities in Mongolia revealed abundant, well-preserved multituberculate skulls and partial skeletons from the Late Cretaceous. This study is centered on two specimens of a new multituberculate taxon from a locality in the Gobi desert, Udan Sayr. Included is a (1) bone-by-bone description of the cranial and mandibular elements, as well as the dental features of both specimens, PSS-MAE 141 (holotype) and PSS-MAE 142, …
Effects Of Passive Immobilization On Locomotor Recovery After Spinal Cord Injury In Adult Rats., Kelsey Lee Stipp
Effects Of Passive Immobilization On Locomotor Recovery After Spinal Cord Injury In Adult Rats., Kelsey Lee Stipp
Electronic Theses and Dissertations
Background: Spontaneous locomotor recovery in spinal rats has been attributed to animals moving freely in-cage. Environmental enrichment has been shown to increase in-cage movement and functional recovery subsequently. Anxiety has been shown to decrease overnight activity in rats. Methods: Rats were double-housed in medium cages (MC) or single-housed in tiny sized cages (TC). Slotted dividers allowed for partial isolation in TC. Overnight activity was monitored bi-weekly. The open field test and BBB’s were taken weekly. Gait analysis was performed at weeks six and eight. Results: MC showed higher overnight activity and improved gait overtime. No differences were found in BBB …