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Chem. Senses 27: 573-575, 2002
© Oxford University Press 2002

SYMPOSIUM: Mechanisms of Differentiation and Migration of Olfactory Progenitors

Determination of Cell Fate within the Telencephalon

Stewart A. Anderson

Department of Psychiatry and Department of Neurology and Neuroscience, Weill Medical College of Cornell University, Box 244, 1300 York Ave., New York, NY 10021, USA

Correspondence to be sent to: Stewart A. Anderson, Department of Psychiatry, Weill Medical College of Cornell University, Box 244, 1300 York Ave., New York, NY 10021, USA. e-mail: SAA2007{at}med.cornell.edu

Abstract

The telencephalon (basal ganglia, septum, cerebral cortex and olfactory bulb) contains two general classes of neurons: those that project axons to distant targets and those that make only local connections. While projection neurons can be either excitatory (such as those in the olfactory bulb and cortex) or inhibitory (such as those in the striatum), local circuit neurons (interneurons) are usually inhibitory. Within these two general classes of neurons there are a myriad of cell subtypes based upon axonal and dendritic morphology, chemical markers, neurotransmitters, connectivity and physiology. A crucial issue regarding the development of the telencephalon is the molecular determination of neuronal subtypes. Since important aspects of neuronal fate determination occur within the proliferative zone, the consideration of determinants of a mature neuron's fate requires consideration of that cell's origin.


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