Various studies have reported cases of selective sparing of environmental sound recognition involving animal, machine or nonverbal human noises (Eustache, Lechevalier, Viader, & Lambert, 1990; Tanaka, Yamadori, & Mori, 1987). The evidence is less clear for selective loss of environmental sound recognition, which has never been observed at onset but only during recovery (Montomura, Yamadori, Mori, & Tamaru, 1986). The recognition of most environmental sounds is thought to be primarily accomplished by secondary auditory association cortices (Mendez & Geehan, 1988).
Table 1.2
Summary of Some Well Documented Cases of Selective Impairment of Melodic Processing
| Study | Auditory domain | Lesion Location | |||
|---|---|---|---|---|---|
| Case(s) | Speech | Music | Environmental | (where available) | |
| Peretz (1993b) | GL | x | x | XX | Bilateral temporal |
| Peretz et al. (1994) | CN | XX | XX | XX | Bilateral temporal |
| Ayotte et al. (2000) | RC | XX | XX | XX | Bilateral temporal |
| Peretz (1990) | VG and VC | XX | XX | XX | RIGHT hemisphere |
| Fries & Swihart (1990) | 1 case | XX | XX | XX | RIGHT temporal |
| Wilson & Pressing (1999) | HJ | XX | XX | XX | RIGHT temporal |
| Ayotte et al. (2000) | 2 cases | XX | XX | RIGHT temporal | |
| Ayotte et al. (2000) | NR | XX | XX | XX | RIGHT temporal |
| 1 case | XX | LEFT temporal | |||
Note. XX = clear impairment of function; x = slight impairment of function
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