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Spinal projections of cat primary afferent fibers innervating lumbar facet joints and multifidus muscle. 1993

R G Gillette, and R C Kramis, and W J Roberts
R.S. Dow Neurological Sciences Institute, Good Samaritan Hospital and Medical Center, Portland, OR 97209-1595.

The spinal projections of small-caliber (presumably nociceptive) afferents arising from lumbar spinal joints and muscles were examined using anterograde transport of WGA-HRP. Injections of WGA-HRP into these structures gave rise to similar, rostro-caudally extensive patterns of spinal labeling indicating that many afferents innervating one facet joint or paraspinal muscle terminate bilaterally in laminae I-II, V-VIII, and X of the lumbar, sacral, and thoracic spinal cord. These diffuse patterns of terminal arborization are reminiscent of visceral input and contrast with the more restricted unilateral terminal fields reported for afferents innervating more distal hindlimb tissues.

UI MeSH Term Description Entries
D007596 Joints Also known as articulations, these are points of connection between the ends of certain separate bones, or where the borders of other bones are juxtaposed. Joint
D008161 Lumbosacral Region Region of the back including the LUMBAR VERTEBRAE, SACRUM, and nearby structures. Lumbar Region,Lumbar Regions,Lumbosacral Regions,Region, Lumbar,Region, Lumbosacral,Regions, Lumbar,Regions, Lumbosacral
D008297 Male Males
D009132 Muscles Contractile tissue that produces movement in animals. Muscle Tissue,Muscle,Muscle Tissues,Tissue, Muscle,Tissues, Muscle
D009411 Nerve Endings Branch-like terminations of NERVE FIBERS, sensory or motor NEURONS. Endings of sensory neurons are the beginnings of afferent pathway to the CENTRAL NERVOUS SYSTEM. Endings of motor neurons are the terminals of axons at the muscle cells. Nerve endings which release neurotransmitters are called PRESYNAPTIC TERMINALS. Ending, Nerve,Endings, Nerve,Nerve Ending
D009475 Neurons, Afferent Neurons which conduct NERVE IMPULSES to the CENTRAL NERVOUS SYSTEM. Afferent Neurons,Afferent Neuron,Neuron, Afferent
D009619 Nociceptors Peripheral AFFERENT NEURONS which are sensitive to injuries or pain, usually caused by extreme thermal exposures, mechanical forces, or other noxious stimuli. Their cell bodies reside in the DORSAL ROOT GANGLIA. Their peripheral terminals (NERVE ENDINGS) innervate target tissues and transduce noxious stimuli via axons to the CENTRAL NERVOUS SYSTEM. Pain Receptors,Receptors, Pain,Nociceptive Neurons,Neuron, Nociceptive,Neurons, Nociceptive,Nociceptive Neuron,Nociceptor,Pain Receptor
D002415 Cats The domestic cat, Felis catus, of the carnivore family FELIDAE, comprising over 30 different breeds. The domestic cat is descended primarily from the wild cat of Africa and extreme southwestern Asia. Though probably present in towns in Palestine as long ago as 7000 years, actual domestication occurred in Egypt about 4000 years ago. (From Walker's Mammals of the World, 6th ed, p801) Felis catus,Felis domesticus,Domestic Cats,Felis domestica,Felis sylvestris catus,Cat,Cat, Domestic,Cats, Domestic,Domestic Cat
D005260 Female Females
D005727 Ganglia, Spinal Sensory ganglia located on the dorsal spinal roots within the vertebral column. The spinal ganglion cells are pseudounipolar. The single primary branch bifurcates sending a peripheral process to carry sensory information from the periphery and a central branch which relays that information to the spinal cord or brain. Dorsal Root Ganglia,Spinal Ganglia,Dorsal Root Ganglion,Ganglion, Spinal,Ganglia, Dorsal Root,Ganglion, Dorsal Root,Spinal Ganglion

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