Contribution of centrifugal innervation to choline acetyltransferase activity in the cat cochlear nucleus
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Cited by (16)
Characterization of three cholinergic inputs to the cochlear nucleus
2023, Journal of Chemical NeuroanatomyAmino acid and acetylcholine chemistry in mountain beaver cochlear nucleus and comparisons to pocket gopher, other rodents, and cat
2020, Hearing ResearchCitation Excerpt :Involvement of amino acids in other aspects of metabolism, including protein synthesis and energy metabolism (Lehninger, 1975), besides that related to neurotransmission, complicates the conclusions that can be drawn from measurements of their tissue levels. Acetylcholine is especially associated with centrifugal pathways to the cochlear nucleus, including branches from the olivocochlear bundle (Godfrey et al., 1983, 1987a,b, 1990; Sherriff and Henderson, 1994; Kraus and Illing, 2004; Meidinger et al., 2006; Mellott et al., 2011), but it is also associated with a few neuron somata within the cochlear nucleus (Godfrey et al., 1987b, 1990; Godfrey, 1993; Vetter et al., 1993). Preliminary reports of mountain beaver data have been presented (Godfrey et al., 1996, 1997, 2000b).
Quantitative distribution of choline acetyltransferase activity in rat trapezoid body
2018, Hearing ResearchCitation Excerpt :Activities of ChAT in the trapezoid body in other animals, such as cat and hamster, are much lower than those in rat, and the contribution of projections via the trapezoid body to ChAT activity in the cochlear nucleus is less in cats (Godfrey et al., 1990) than in rats (Godfrey et al., 1987c), suggesting that there may be considerable cross-species variation in the magnitude and characteristics of cholinergic system effects in the cochlear nucleus. The much higher ChAT activity in the trapezoid body of the rat, as compared to cat or hamster, correlates with higher ChAT activity in the non-granular regions of the rat cochlear nucleus as compared to cat or hamster (Godfrey et al., 1987b,c, 1990, 2013). After cochlear damage by cochlear ablation or noise trauma, increases of ChAT activity and immunoreactivity have been measured in the cochlear nucleus (Jin et al., 2005, 2006; Meidinger et al., 2006; Godfrey et al., 2013).
Effects of surgical lesions on choline acetyltransferase activity in the cat cochlea
2017, Hearing ResearchCitation Excerpt :A preliminary presentation of the results has been made (Wiet et al., 1989). These experiments were carried out on temporal bones obtained during a previous study on the cochlear nucleus of cats (Godfrey et al., 1990a). The temporal bones were isolated and quickly frozen after the removal and freezing of brain tissues.
Suppression of noise-induced hyperactivity in the dorsal cochlear nucleus following application of the cholinergic agonist, carbachol
2013, Brain ResearchCitation Excerpt :This bundle originates from neurons in the superior olivary complex (Warr, 1992) and is largely cholinergic (Godfrey et al., 1984; Rasmussen, 1967; Osen et al., 1984; Moore, 1988; Sherriff and Henderson, 1994). Although the main trunk of the bundle continues peripherally to innervate cochlear outer hair cells and the peripheral dendrites of type I primary afferent neurons, collaterals of this bundle enter the cochlear nucleus where they terminate in and around the granule cell domain (Godfrey et al., 1987a,b, 1990, 1997; Benson and Brown, 1990; Mellott et al., 2011; Shore and Moore, 1998; Schofield et al., 2011). Application of cholinergic agonists to the DCN results in activation of granule cells (Kőszeghy et al., 2012) and increased bursting activity of their inhibitory targets, the cartwheel cells (Chen et al., 1994, Chang et al., 2002).
Multiple origins of cholinergic innervation of the cochlear nucleus
2011, Neuroscience