Some observations on the catecholaminergic innervation of the intermediate zone of the thoracolumbar spinal cord of the cat

The Journal of Comparative Neurology
E M McLachlan, B J Oldfield

Abstract

The anatomical arrangement of catecholaminergic nerve terminals in the intermediate zone of the thoracolumbar spinal cord was examined with the fluorescence microscope in serial sections of spinal cord from adult cats perfused with a formaldehyde-glutaraldehyde mixture. Specific fluorescence in this material was assumed to represent noradrenaline. The distribution of fluorescent varicose nerve terminals was compared with that of neuron cell bodies in the same sections after Nissl counterstaining, and with the known topographic distribution of sympathetic preganglionic neurons. Dense accumulations of noradrenergic fibers were found in the intermediate zone in all segments between the caudal part of C8 and the rostral part of L4. These were not only associated with preganglionic neurons in the intermediolateral columns (ILN), but below T5 also extended in bands (1-3 per mmm of spinal cord) toward, and in some segments across, the midline. Noradrenergic terminals were associated with cell bodies in most parts of the ILN from T1 to T8 and in L2-3. Between T9 and L2, the innervation of the ILN was patchy, and the majority of the noradrenergic fibers projected to regions medial to the ILN. These corresponded to sites at which pregang...Continue Reading

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Citations

Oct 29, 1986·Brain Research·P L VeraN Schneiderman
Jul 4, 1994·Brain Research·B J OldfieldF A Mendelsohn
Jun 19, 1992·Brain Research. Developmental Brain Research·N RajaofetraA Privat
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Jun 1, 1985·The Journal of Comparative Neurology·B J OldfieldG Nilaver
May 8, 1989·The Journal of Comparative Neurology·C R AndersonO Srb-Christie

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