Some Facets of the Organization of the Principal Division of the Cat Medial Geniculate Body

Aitkin, Lindsay; Calford, Michael B.; Kenyon, C. E.; Webster, William S.

doi:10.1007/978-1-4684-3908-3_17

Cited by 20 publications

(15 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In turn, it projects to the primary auditory cortex (Te1 in the rat) (Patterson, 1976;Roger and Arnault, 1989;Clerici and Coleman, 1990;Romanski and LeDoux, 1993a,b;Winer et al, 1999b). In contrast, both the MGd and PL receive projections from the pericentral areas of the inferior colliculus, and then project to the associative auditory areas Te2 and Te3, and to the lateral amygdala (Aitkin et al, 1981;LeDoux et al, 1985LeDoux et al, , 1987Arnauld and Roger, 1990;Doron and LeDoux, 1999;Linke et al, 2000).…”

Section: Introductionmentioning

confidence: 93%

Chemical divisions in the medial geniculate body and surrounding paralaminar nuclei of the rat: quantitative comparison of cell density, NADPH diaphorase, acetyl cholin esterase and basal expression of c-fos

Olucha-Bordonau

Pérez-Villalba

Teruel‐Martí

et al. 2004

Journal of Chemical Neuroanatomy

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 93%

Chemical divisions in the medial geniculate body and surrounding paralaminar nuclei of the rat: quantitative comparison of cell density, NADPH diaphorase, acetyl cholin esterase and basal expression of c-fos

Olucha-Bordonau

Pérez-Villalba

Teruel‐Martí

et al. 2004

Journal of Chemical Neuroanatomy

View full text Add to dashboard Cite

“…. The MGB of the cat has been divided into at least seven subnuclei on the basis of cellular morphology in Golgi-stained material (Morest, 1964(Morest, , 1965aRamhn y Cajal, 1955); using current terminology these are: pars lateralis (LV) and pars ovoidea (OV) of the ventral division (MGV), caudodorsal (DC), deep dorsal (Dd), and suprageniculate (NS) nuclei of the dorsal division, the ventrolateral nucleus (VL), and the medial division (MGM) (Andersen et al, 1980a, b;Calford and Webster, 1981). Most electrophysiological studies have been concerned only with the properties of units in the ventral division.…”

mentioning

confidence: 99%

“…Most electrophysiological studies have been concerned only with the properties of units in the ventral division. Units in LV and OV have short latencies to acoustic stimuli and are sharply tuned to tonal frequency; LV has been shown to have a laterocaudoventral to mediorostrodorsal/low-to high-unit best frequency (BF) tonotopic organization (Aitkin and Webster, 1972;Calford and Webster, 1981). Units in MGM are reported to show a wide range of tuning properties, from extremely broad to as sharp as MGV (Aitkin, 1973;Phillips and Irvine, 1979), and most units in DC show extremely broadtuning characteristics and respond at long latencies (Calford and Webster, 1981).…”

mentioning

confidence: 99%

The parcellation of the medial geniculate body of the cat defined by the auditory response properties of single units

1983

View full text Add to dashboard Cite

Single unit responses were recorded in the medial geniculate body (MGB) of anesthetized cats. In response to acoustical stimulation the properties of response latency, discharge pattern, frequency tuning, binaural interaction, and habituation were examined to allow an appraisal of the differentiation of the MGB by electrophysiological means. It is found that definite boundaries can be determined at which there is a distinct change in response properties; the position of these "physiological boundaries" seems to correspond with the boundaries between the seven subnuclei of the MGB described by Morest (Morest, D. K. (1964) J. Anat. 98: 611-630) in Golgi-stained material. Using these physiological boundaries to determine unit locations, population comparisons are made allowing the description of each subnucleus in terms of its auditory response properties. It is suggested that these properties, together with the limited information gained from Nissl cytoarchitecture, are sufficient to describe the location of physiological recording sites in the MGB.

show abstract

“…Contralaterally (asterisks), the sagulum projects to the medial division of the medial geniculate body and the dorsal cortex and lateral nucleus of the inferior colliculus. The principal references documenting these projections are: 1) present results; 2) Aitkin et al (1981), Calford and Aitkin (1983), Henkel (1983), Whitley and Henkel (1984), and present results; 3) Henkel (1983), Whitley and Henkel (1984), Hutson et al (1991), and present results; 4) Henkel and Shneiderman (1988) …”

Section: Comparison With Other Auditory Corticofugal Systemsmentioning

confidence: 96%

Auditory connections and neurochemistry of the sagulum

et al. 1998

View full text Add to dashboard Cite

We studied the cytoarchitecture, neurochemical organization, and connections of the sagulum. The goal was to clarify its role in midbrain, lateral tegmental, and thalamic auditory processing. On cytoarchitectonic grounds, ventrolateral (parvocellular) and dorsomedial (magnocellular) subdivisions were recognized. The patterns of immunostaining for gamma-aminobutyric acid (GABA) and glycine were distinct. Approximately 5-10% of the neurons were GABAergic, and more than one type was identified; GABAergic axon terminals were abundant in number and varied in form. Glycinergic neurons were much rarer, < 1% of the population, and glycinergic axon terminals were correspondingly sparse. Wheat germ agglutinin conjugated to horseradish peroxidase was used for purposes of connectional mapping, and biotinylated dextran amines revealed the structure of corticosagular axons. All nine cortical areas injected project to the ipsilateral sagulum. Five (areas AI, AII, SF, EPD, and Te) had heavier projections than the others. Areas AI and AII projected throughout the rostrocaudal sagulum. Labeling from AI was moderate in density and concentrated in the central sagulum, whereas the input from AII was heavier and ended more laterally. Suprasylvian fringe input was light, especially caudally, and was chiefly in the central sagulum. The projection from the dorsal region of the posterior ectosylvian gyrus was comparatively stronger and was in the dorsolateral sagulum. Finally, the temporal cortex sent axons to the most lateral sagulum, spanning the dorsoventral extent, whereas insular cortex axons ended diffusely in the dorsolateral sagulum. Corticofugal axons ranged from fine boutons en passant to larger globular terminals. The sagulum may represent the earliest significant opportunity in the ascending auditory pathway for corticofugal modulation. The most extensive input arises from the polymodal association areas. The sagulum then projects divergently to the dorsal cortex of the inferior colliculus and the dorsal division of the medial geniculate body. The projection from the dorsal division of the auditory thalamus to nonprimary auditory cortex completes this circuit between the forebrain and the midbrain and represents a nexus in the ascending and descending auditory systems. Such circuits could play a critical role in auditory-motor adjustments to sound.

show abstract

Some Facets of the Organization of the Principal Division of the Cat Medial Geniculate Body

Cited by 20 publications

References 20 publications

Chemical divisions in the medial geniculate body and surrounding paralaminar nuclei of the rat: quantitative comparison of cell density, NADPH diaphorase, acetyl cholin esterase and basal expression of c-fos

Chemical divisions in the medial geniculate body and surrounding paralaminar nuclei of the rat: quantitative comparison of cell density, NADPH diaphorase, acetyl cholin esterase and basal expression of c-fos

The parcellation of the medial geniculate body of the cat defined by the auditory response properties of single units

Auditory connections and neurochemistry of the sagulum

Contact Info

Product

Resources

About