Innervation of the Dermatomes in the Neck of the Mouse

Abstract

The dorsal rami of the cervical and thoracic spinal nerves were investigated using both the in situ chohnesterase staining technique and chohnesterase staining on serial sections of plastic-embedded embryos. In most cases only the dorsal rami of the 2nd to 5th cervical spinal nerve possess cutaneous branches.The area innervated by the cutaneous branch of the dorsal ramus of the 5th spinal nerve borders on an area innervated by the cutaneaous branch of the dorsal ramus of the 1st thoracic spinal nerve. The dorsal rami of the cervical spinal nerves 6–8 show no cutaneous branches. Therefore the gap in the series of the dorsal cutaneous branches is due only to the middle part of the nerves of the brachial plexus, which range from the 5th cervical nerve to the 1st thoracic nerve.

The spinal nerves forming the brachial plexus in mole-rats (Spalax leucodon)

“…Tipirdamaz and Erden (1988) and Dursun et al (1994) reported that in dogs the brachial plexus is formed by the ventral rami of C6, C7, C8, T1 and T2, while Miller et al (1964) and Getty (1975) reported that T2 is involved occasionally. The brachial plexus in mole-rats was formed by the rami ventrales of C5, C6, C7, C8 and T1, and this is in agreement with the findings in mice (Cook 1965;Bogusch 1987) and in contradiction with the remainder of the reported findings.…”

“…Yilmaz et al (1995) reported that the brachial plexus of the rabbit is formed by the ventral rami of C5, C6, C7, C8, T1 and T2, while Aslan (1994) and McLaughlin and Chiasson (1987) rejected the contribution of C5 and T2. The brachial plexus is formed by the ventral rami of C5, C6, C7, C8 and T1 in mice (Cook 1965;Bogusch 1987), by the ventral rami of C5, C6, C7 and C8 in squirrels (Aydin 2011), by the rami ventralis of C5, C6, C7, C8, T1 and T2 in Wervet monkeys (Booth 1991),in Chacma baboons (Booth et al 1997) and in porcupines (Aydin 2003) and the ventral rami of C6, C7, C8 and T1 in cats (McClure et al 1973;Getty 1975). Tipirdamaz and Erden (1988) and Dursun et al (1994) reported that in dogs the brachial plexus is formed by the ventral rami of C6, C7, C8, T1 and T2, while Miller et al (1964) and Getty (1975) reported that T2 is involved occasionally.…”

Hypermorphic mutation of the voltage-gated sodium channel encoding gene Scn10a causes a dramatic stimulus-dependent neurobehavioral phenotype

“…Glial cell-derived neurotrophic factor was omitted from the culture media to maintain low Na v 1.9 expression (32). Na v 1.8-mediated currents in neurons from DRG innervating the skin of the neck [C2-5 and T1 (33)] and T2-L5 were similar, and data were combined. Neurons from Possum mice were compared with C57BL/6 controls or wildtype littermates with equivalent results.…”

Brachial plexus of the porcupine (Hystrix cristata)

“…The brachial plexus has been studied in variety of mammals including dog (Miller et al, 1964;Tipirdamaz and Erden, 1988;Dursun et al, 1994), cat (McClure et al, 1973;Ge�y, 1975), Wervet monkey (Booth, 1991), Chacma baboon (Booth et al, 1997), rabbit (Aslan, 1994Yilmaz et al, 1995), mouse (Cook, 1965;Bogusch, 1987) and rat (Green, 1968;Chiasson, 1980;Bertelli et al, 1992). To the author's knowledge this is the first study on the brachial plexus of porcupines (Hystrix cristata).…”