After bilateral ablation of the auditory areas of the cerebral cortex, experimental animals have a severe deficit in ability to discriminate between temporal patterns of tonal stimuli and to localize sound in space. These two kinds of discrimination are basic for communication and for attack or avoidance of prey and predator. Recognition of which ear is stimulated may also depend upon excitation of auditory cortex contralateral to the given ear. Binaural discriminations are dependent upon interaction of nerve impulses from the two ears at a low level in the auditory nervous system. Similar hearing losses have been reported for human patients.
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References
1.
HarrisonJMHoweME: Anatomy of the afferent auditory nervous system of mamals, in KeidelWDNeffWD (eds): Handbook of Sensory Physiology, Auditory System, V, pt 1. Berlin, Springer-Verlag, 1974, pp 283–336.
2.
RasmussenGL: Anatomic relationships of the ascending and descending auditory systems, in FieldsWSAlfordBR (eds): Neurological Aspects of Auditory and Vestibular Disorders.Springfield, Illinois, C.C. Thomas, 1964, pp 5–19.
3.
GacekRR: The efferent cochlear bundle in man. Arch Otolaryngol74: 690–694, 1961.
4.
NeffWDDiamondITCassedayJH: Behavioral studies of auditory discrimination: central nervous system, in KeidelWDNeffWD (eds): Handbook of Sensory Physiology, Auditory System, V, pt 2. Berlin, Springer-Verlag, 1975, pp 307–400.
5.
MorestDK: The neuronal architecture of the medial geniculate body of the cat. J Anat98: 611–630, 1964.
6.
MorestDK: The laminar structure of the medial geniculate body of the cat. J Anat99: 143–160, 1965a.
7.
MorestDK: The lateral tegmental system of the midbrain and the medial geniculate body: study with Golgi and Nauta methods in cat. J Anat99: 611–634, 1965b.
8.
MorestDK: Electron microscopic study of the synaptic organization in the medial geniculate body of the cat. Anat Rec166: 351, 1970a.
9.
MorestDK: Synaptic relationships of golgi type II cells in the medial geniculate body of the cat. J Comp Neurol162: 2,157–193, 1975.
10.
DiamondITNeffWD: Ablation of temporal cortex and discrimination of auditory patterns. J Neurophysiol20: 300–315, 1957.
11.
JerisonHJNeffWD: Effect of cortical ablation in the monkey on discrimination of auditory patterns, abstracted. Fed Proc12: 73–74, 1953.
12.
KonorskiJ: A new method of physiological investigation of recent memory in animals. Bull Acad Pol Sci [Biol]7: 115–117, 1959.
13.
ChorazynaH: Investigation of recent memory of acoustic stimuli in normal dogs. Bull Acad Pol Sci [Biol]7: 119–121, 1959.
14.
ChorazynaHStepienL: Effect of bilateral sylvian gyrus ablations on auditory conditioning in dogs. Bull Acad Pol Sci [Biol]11: 43–45, 1963.
15.
StepienLSCordeauJPRasmussenT: The effect of temporal lobe and hippocampal lesions on auditory and visual recent memory. Brain83: 470–489, 1960.
16.
ScharlockDPNeffWDStromingerNL: Discrimination of tone duration after bilateral ablation of cortical auditory areas. J Neurophysiol28: 673–681, 1965.
17.
MilnerB: Laterality effects in audition. Interhemispheric Relations and Cerebral Dominance.Baltimore, Maryland, Johns Hopkins Press, 1962.
18.
ShankweilerD: Effects of temporal lobe damage on perception of dichotically presented melodies. J Comp Physiol Psychol62: 115–119, 1966.
19.
MilnerBKimuraDTaylorLB: Nonverbal auditory learning after frontal or temporal lobectomy in man. Presented at Eastern Psychological Assoc., Atlantic City, New Jersey, 1965.
20.
SchulhoffCGoodglassH: Dichotic listening, side of brain injury and cerebral dominance. Neuropsychology7: 149–160, 1969.
21.
LhermitteFChainFEscourolleR: Etude des troubles perceptifs auditifs dans les lesions temporales bilaterales. Rev Neurol124: 329–351, 1971.
22.
KarasevaTA: The role of the temporal lobe in human auditory perception. Neuropsychology10: 227–231, 1972.
23.
JergerJWeikersNTSharbroughFWIII: Bilateral lesions of the temporal lobe. Acta Otolaryngol [Suppl] (Stockh) 258: 1–51, 1969.
24.
CassedayJHNeffWD: Auditory localization: role of auditory pathways in brainstem of the cat. J Neurophysiol38: 842–858, 1975.
25.
MooreCNCassedayJHNeffWD: Sound localization: the role of the commissural pathways of the auditory system of the cat. Brain Res82: 13–26, 1974.
26.
HeffnerHEMastertonRB: The contributions of auditory cortex to sound localization in the monkey. J Neurophysiol38: 1340–1358, 1975.
27.
NeffWDCassedayJH: Effects of unilateral ablation of auditory cortex on monaural cat's ability to localize sound. J Neurophysiol40: 44–52, 1977.
28.
StromingerNL: Localization of sound in space after unilateral and bilateral ablation of auditory cortex. Exp Neurol25: 521–533, 1969a.
29.
PenfieldWRasmussenT: The Cerebral Cortex of Man, a Clinical Study of Localization of Function.New York, The Macmillan Company, 1950.
30.
PenfieldWJasperH: Epilepsy and the Functional Anatomy of the Human Brain.Boston, Little, Brown and Company, 1954.
31.
KaasJAxelrodS. Diamond IT: An ablation study of the auditory cortex in the cat using binaural tonal patterns. J Neurophysiol30: 710–724, 1967.
32.
MastertonRBDiamondIT: Effects of auditory cortex ablation on discrimination of small binaural time differences. J Neurophysiol27: 15–36, 1964.
33.
MastertonBJaneJADiamondIT: Role of brainstem auditory structures in sound localization. I. Trapezoid body, superior olive, and lateral lemniscus. J Neurophysiol30: 341–359, 1967.
34.
MastertonRBJaneJADiamondIT: Role of brainstem auditory structures in sound localization. II. Inferior colliculus and its brachium. J Neurophysiol31: 96–108, 1968.
35.
WhitfieldICCranfordJRavizzaR: Effects of unilateral ablation of auditory cortex in cat on complex sound localization. J Neurophysiol35: 718–731, 1972.
36.
CranfordJLOberholtzerM: Role of neocortex in bianural hearing in the cat. II. The ‘precedence effect’ in sound localization. Brain Res111: 225–239, 1976.
