Development of innervation to maxillary whiskers in mice

Adel Maklad, Marianne Conway, Cole Hodges, Laura A. Hansen

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The maxillary vibrissal pad is a unique, richly innervated sensory apparatus. It is highly evolved in the rodent that it constitutes a major source of sensory information to the somatosensory cortex. In this report, indocarbocyanine tracing and immunofluorescence were used to study the embryonic and early neonatal development of innervation to maxillary vibrissal follicles in mice. The first sign of vibrissal follicle innervation occurred at embryonic day 12 (E12), when the lateral nasal and maxillary processes were penetrated by nerve branches with small terminal plexuses assuming the positions of vibrissal follicle primordia. Between E13 and E15, the nerve plexuses at the presumptive follicles grew in size and became more numerous with no signs of specific receptor subtype formation. By E17, the nerve plexuses had grown further in size and the region-specific receptor subtype specification developed. At birth (P0), the superficial vibrissal nerves began to innervate the apical part of the inner conical body, whereas the deep vibrissal nerve gave off the recurrent cavernous branches. At P3, all of the different sets of receptor subtypes had regional distributions, densities and morphologies comparable to those described in adult mice. A 3-day old mouse had all complements of sensory receptors necessary for somatosensory transduction as revealed not only by neuroanatomic tracing but also with immunofluorescence for several markers of neurosensory differentiation. Our data reveal a hitherto unknown time table for the development of peripheral sensory receptors in the vibrissal follicles. This time table parallels that of their central targets in the somatosensory barrel cortex, which develops at P4.

Original languageEnglish
Pages (from-to)1553-1567
Number of pages15
JournalAnatomical Record
Volume293
Issue number9
DOIs
StatePublished - 2010

Fingerprint

Vibrissae
innervation
nerve tissue
Somatosensory Cortex
Sensory Receptor Cells
plexus
Fluorescent Antibody Technique
mice
sensory receptors
rodent
Complement Receptors
Differentiation Antigens
receptors
fluorescent antibody technique
cortex
Nose
neonatal development
Rodentia
Parturition
complement

All Science Journal Classification (ASJC) codes

  • Anatomy
  • Histology
  • Ecology, Evolution, Behavior and Systematics
  • Biotechnology
  • Medicine(all)

Cite this

Development of innervation to maxillary whiskers in mice. / Maklad, Adel; Conway, Marianne; Hodges, Cole; Hansen, Laura A.

In: Anatomical Record, Vol. 293, No. 9, 2010, p. 1553-1567.

Research output: Contribution to journalArticle

Maklad, Adel ; Conway, Marianne ; Hodges, Cole ; Hansen, Laura A. / Development of innervation to maxillary whiskers in mice. In: Anatomical Record. 2010 ; Vol. 293, No. 9. pp. 1553-1567.
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