Tract-Tracing Study in the Goldfish: A Suspected Homologue of the Mammalian Central Nucleus of the Amygdala

Matt Hartsock

Location

Science Center, A209

Document Type

Presentation

Start Date

4-27-2012 2:45 PM

End Date

4-27-2012 3:45 PM

Abstract

In mammals, the amygdala is the key brain structure coordinating emotional responses. While amygdalar homologues (i.e. structural equivalents) have been observed across tetrapods, they have yet to be confirmed in bony fishes, which share a common ancestor with tetrapods. I used tract-tracing techniques to examine a proposed amygdalar homologue in goldfish, demonstrating connections comparable to those seen in mammals. My results indicate that amygdalar origins extend beyond bony fish divergence on an evolutionary timeline.

Notes

Session II, Panel 5: Family Trees: Studies of Origins in Flora and Fauna
Moderator: Keith Tarvin, Associate Professor of Biology

Major

Neuroscience

Advisor(s)

Lynne Bianchi, Neuroscience

Project Mentor(s)

Mark Braford, Biology; Neuroscience

April 2012

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Apr 27th, 2:45 PM Apr 27th, 3:45 PM

Tract-Tracing Study in the Goldfish: A Suspected Homologue of the Mammalian Central Nucleus of the Amygdala

Science Center, A209

In mammals, the amygdala is the key brain structure coordinating emotional responses. While amygdalar homologues (i.e. structural equivalents) have been observed across tetrapods, they have yet to be confirmed in bony fishes, which share a common ancestor with tetrapods. I used tract-tracing techniques to examine a proposed amygdalar homologue in goldfish, demonstrating connections comparable to those seen in mammals. My results indicate that amygdalar origins extend beyond bony fish divergence on an evolutionary timeline.