Abstract
We have studied the distribution of alpha-neo-endorphin- or neurokinin B-immunoreactive fibres and cell bodies in the adult human brainstem with no prior history of neurological or psychiatric disease. A low density of alpha-neo-endorphin-immunoreactive cell bodies was only observed in the medullary central gray matter and in the spinal trigeminal nucleus (gelatinosa part). Alpha-neo-endorphin-immunoreactive fibres were moderately distributed throughout the human brainstem. A high density of alpha-neo-endorphin-immunoreactive fibres was found only in the solitary nucleus (caudal part), in the spinal trigeminal nucleus (caudal part), and in the gelatinosa part of the latter nucleus. Neurokinin B-immunoreactive cell bodies (low density) were found in the periventricular central gray matter, the reticular formation of the pons and in the superior colliculus. The distribution of the neurokinin-immunoreactive fibres was restricted. In general, for both neuropeptides the density of the immunoreactive fibres was low. In the human brainstem, the proenkephalin system was more widely distributed than the prodynorphin system, and the preprotachykinin A system (neurokinin A) was more widely distributed than the preprotachykinin B system (neurokinin B).
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Abbreviations
- AbdNu:
-
Abducens nucleus
- AccNu:
-
Nucleus of the accessory nerve
- CA:
-
Cerebral aqueduct
- CeGy:
-
Medullary central gray
- Cegy:
-
Periaqueductal central gray
- CEgy:
-
Periventricular central gray
- CSNu:
-
Chief sensory nucleus
- CSp:
-
Corticospinal fibres
- CTT:
-
Central tegmental tract
- DAO:
-
Dorsal accessory olivary nucleus
- DCNu:
-
Dorsal cochlear nucleus
- DMNu:
-
Dorsal motor nucleus of the vagus
- FacNu:
-
Motor facial nucleus
- FCu:
-
Fasciculus cuneatus
- FGr:
-
Fasciculus gracilis
- HyNu:
-
Motor hypoglossal nucleus
- IC, CNu:
-
Inferior colliculus, central nucleus
- IC, LZ:
-
Inferior colliculus, lateral zone
- ISNu:
-
Inferior salivatory nucleus
- LCNu:
-
Lateral cuneate nucleus
- LoCer:
-
Locus coeruleus
- LRNu:
-
Lateral reticular nucleus
- MAO:
-
Medial accessory olivary nucleus
- ML:
-
Medial lemniscus
- MLF:
-
Medial longitudinal fascicle
- MVN:
-
Medial vestibular nucleus
- NuAm:
-
Nucleus ambiguus
- NuCu:
-
Cuneate nucleus
- NuGr:
-
Gracile nucleus
- NuPp:
-
Nucleus prepositus hypoglossi
- PCbF:
-
Pontocerebellar fibres
- PO:
-
Principal part of the inferior olivary nucleus
- PonNu:
-
Pontine nuclei
- Py:
-
Pyramidal tract
- RB:
-
Restiform body
- RetF:
-
Reticular formation
- SC:
-
Superior colliculus
- SCP:
-
Superior cerebellar peduncle
- SM:
-
Stria medullaris of fourth ventricle
- SN:
-
Substantia nigra
- SO:
-
Superior olive
- SolNu:
-
Nucleus of the solitary tract
- SolTr:
-
Solitary tract
- SpTNu:
-
Spinal trigeminal nucleus
- SpTNu (g):
-
Spinal trigeminal nucleus (gelatinosa)
- SpTNu (m):
-
Spinal trigeminal nucleus (magnocellular)
- SpTT:
-
Spinal trigeminal tract
- SpVN:
-
Spinal (inferior) vestibular nucleus
- TecSp:
-
Tectospinal tract
- TriMoNu:
-
Trigeminal motor nucleus (caudal part)
- TroNu:
-
Trochlear nucleus
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Acknowledgments
The authors wish to thank N. Skinner for supervising the English text and Professor Gérard Tramu (University of Bordeaux I, France) for kindly providing the alpha-neo-endorphin antiserum. This work has been supported by the Ministerio de Educación y Ciencia (BFU2005-02241/BFI) and by the Ministerio de Ciencia e Innovación (BFU2008-03369/BFI), Spain.
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Duque, E., Mangas, A., Salinas, P. et al. Mapping of alpha-neo-endorphin- and neurokinin B-immunoreactivity in the human brainstem. Brain Struct Funct 218, 131–149 (2013). https://doi.org/10.1007/s00429-012-0388-3
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DOI: https://doi.org/10.1007/s00429-012-0388-3