Neuropeptide Y-immunoreactive spinal neurons make close appositions on axons of primary sensory afferents.
The dorsal cells in the lamprey are primary sensory neurons located in a parasagittal region of the spinal cord. In the same plane neuropeptide Y (NPY) immunoreactivity has been described. To investigate if the dorsal cells were in contact with NPY-immunoreactive (ir) fibers and cell bodies, intracellular injections of Lucifer yellow into identified dorsal cells were combined with NPY immunohistochemistry. NPY-ir varicosities were found to be in close apposition to both the descending and the ascending axon of dorsal cells. No NPY-ir boutons were seen in close contact with the dorsal cell bodies.
Nobel Institute for Neurophysiology, Karolinska Institutet, Stockholm, Sweden.
F
F
Bongianni
J
J
Christenson
T
T
Hökfelt
S
S
Grillner
D000344:Afferent Pathways / Q000033:anatomy & histology* / Q000166:cytology; D000818:Animals; D001369:Axons / Q000648:ultrastructure*; D007798:Lampreys; D009475:Neurons, Afferent / Q000166:cytology*; D009478:Neuropeptide Y / Q000032:analysis*; D013116:Spinal Cord / Q000033:anatomy & histology* / Q000166:cytology
D009478:Neuropeptide Y