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c-fos Expression in Rat Brain Nuclei Following Incisor Tooth Movement

¹ Department of Morphology, Stomatology and Physiology,
² Department of Childhood Clinical, Social and Preventive Odontology, Dental School of Ribeirão Preto, University of São Paulo, Avenida do Café s/n, CEP 14040-904, Ribeirão Preto, SP, Brazil;

View larger version (87K): [in a new window]   Figure 1. Orthodontic appliance used in this study. Distance between the major marks represents 1 cm (A). View of the activated appliance set on the rat maxilla at the end of the experiment (B).

View larger version (82K): [in a new window]   Figure 2. Photomicrograph in high and low magnification (upper right) through the dorsal raphe (A) and subnucleus caudalis (B) showing Fos-IR neurons. sptV, spinal tract of the trigeminal nerve spinal; AQ, cerebral aqueduct.

View larger version (55K): [in a new window]   Figure 3. Photomicrograph in high magnification and low magnification (upper right) through peri-aqueductal gray matter (A), parabrachial nucleus (B), and locus coeruleus (C) showing Fos-IR neurons. AQ, cerebral aqueduct; scp, superior cerebellar peduncle; sctv, ventral spinocerebellar peduncle; V4, fourth ventricle.

View larger version (14K): [in a new window]   Figure 4. Effect of 3 hrs of incisor tooth movement without or with 70-g orthodontic force on the number (mean ± SEM) of Fos-like immunoreactive neurons (Fos-IR) in the trigeminal subnuclei: caudalis (SpVc) and interpolaris (SpVi), locus coeruleus (LC), parabrachial nucleus (PB), peri-aqueductal gray matter (PAG), and dorsal raphe (DR). *P < 0.05 in relation to control group where appliance was inserted without orthodontic force. Number of sections analyzed in parentheses.