Table 3.

Summary of changes in inferior colliculi.

Author(s)	Species	Etiology	Deafness onset	Change(s) observed
Moore and Kowalchuk, 1988	Ferret	Cochlear lesion	Day 12–93	↓ volume
Nishiyama et al., 2000	Cat	Ototoxic	Day 10	↓ soma area
Hardie et al., 1998	Cat	Ototoxic	Day 10	↓ synaptic density
				↓ # of presynaptic vesicles
Trune, 1983	Mouse	Cochlear lesion	Day 6	↓ # of projections from CN
Vale and Sanes, 2000	Gerbil	Cochlear ablation	Day 7	↓ inhibitory synapse strength
Vale and Sanes, 2002	Gerbil	Cochlear ablation	Day 9	↓ inhibitory and excitatory synapse strength
Shepherd et al., 1999	Cat	Ototoxic	Day 10	↓ temporal resolution
Snyder et al., 1995	Cat	Ototoxic	Day 16	↓ temporal resolution
Vollmer et al., 2005	Cat	Ototoxic	Day 14–25	↓ temporal resolution
Moore, 1994	Ferret	Cochlear removal	Day 25	No change in # of neurons
Moore, 1990	Ferret	Cochlear removal	Day 5	No change in # of neurons
				No change in projection pattern from CN
Russell and Moore, 1995	Gerbil	Cochlear removal	Day 2–14	No change in projection pattern from SO
Heid et al., 1997	Cat	Congenital	Day 0	No change in projection pattern from CN/SO
				Tonotopy is maintained
Shepherd and Javel, 1999	Cat	Ototoxic	Unknown	Tonotopy is maintained
Snyder et al., 1990	Cat	Ototoxic	Day 16	Tonotopy is maintained
Snyder et al., 1991	Cat	Ototoxic	Day 16	Tonotopy is maintained

CN, Cochlear nucleus; SO, Superior olive.