Septotectal projections in the cat

Powell, Ervin W.; Hoelle, Donald F.

doi:10.1016/0014-4886(67)90039-8

Cited by 34 publications

(3 citation statements)

References 8 publications

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“…In addition, collicular projections have been traced to brainstem nuclei (Foreman 1980;Kawamura, Brodal & Hoddevik 1974;Tasiro 1939) which have strong connections with the hippocampus (Grantyn & Grantyn 1973;Green & Arduini 1954;Macadar, Chalupa & Lindsley 1974;Redding 1967; Vertes 1980), and connections might also exist via the hypothalamus (Kappers et al I960;Trulson & Randall 1973). Electrophysiological relationships between the two structures have been noted (Routtenberg & Taub 1973); indeed, the superior colliculus has been referred to as a "limbo-somatic convergence center" (Powell & Hoelle 1967).…”

Section: Introductionmentioning

confidence: 99%

Relationships between the superior colliculus and hippocampus: Neural and behavioral considerations

Foreman

Stevens

1987

Behav Brain Sci

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Theories of superior collicular and hippocampal function have remarkable similarities. Both structures have been repeatedly implicated in spatial and attentional behaviour and in inhibitory control of locomotion. Moreover, they share certain electrophysiological properties in their single unit responses and in the synchronous appearance and disappearance of slow wave activity. Both are phylogenetically old and the colliculus projects strongly to brainstem nuclei instrumental in the generation of theta rhythm in the hippocampal EECOn the other hand, close inspection of behavioural and electrophysiological data reveals disparities. In particular, hippocampal processing mainly concerns stimulus ambiguity, contextual significance, and spatial relations or other subtle, higher order characteristics. This requires the use of largely preprocessed sensory information and mediation of poststimulus investigation. Although collicular activity must also be integrated with that of “higher” centres (probably to a varying degree, depending on the nature of stimuli being processed and the task requirements), its primary role in attention is more “peripheral” and specific in controlling orienting/localisation via eye and body movements toward egocentrically labelled spatial positions. In addition, the colliculus may exert a nonspecific influence in alerting higher centres to the imminence of information potentially worthy of focal attention. Nevertheless, it is noteworthy that collicular and hippocampal lesions produce deficits on similar tasks, although the type of deficit is usually different (often opposite) in each case. Functional overlap between hippocampus and colliculus (i.e., strategically synchronised or mutually interdependent activity) is virtually certain vis-à-vis stimulus sampling, for example in the acquisition of information via vibrissal movements and visual scanning. In addition, insofar as stimulus significance is a factor in collicular orienting mechanisms, the hippocampus — cingulate – cortex — colliculus pathway may play a significant role, modulating collicular responsiveness and thus ensuring an attentional strategy appropriate to current requirements (stimulus familiarity, stage of learning). A tentative “reciprocal loop” model is proposed which bridges physiological and behavioural levels of analysis and which would account for the observed degree and nature of functional overlap between the superior colliculus and hippocampus.

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Section: Introductionmentioning

confidence: 99%

Relationships between the superior colliculus and hippocampus: Neural and behavioral considerations

Foreman

Stevens

1987

Behav Brain Sci

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“…Polyak (1957, p. 308) notes that the superior colliculus of the monkey is well developed-as much so as the cat's-in spite of the much greater "encephalization" of the visual system in the former species. The superior colliculus has prominent interconnections with the "limbic-midbrain circuit," and Powell and Hoelle (1967) have proposed that the superior colliculus is a "limbosomatic convergence center"; in their Nauta-Gygax study they found 2 separate pathways from the septum to the superior colliculi. Other connections of the superior colliculus with the limbic-midbrain circuit include the prominent tectoreticular fibers (Altman & Carpenter, 1961) and the radiatio grisea tegmenti of Weisschedel (Nauta, 1958).…”

Section: Anatomymentioning

confidence: 99%

5-hydroxytryptamine metabolism, superior colliculus, and grooming behavior in cats with pontile lesions.

Trulson¹,

Randall²

1973

Journal of Comparative and Physiological Psychology

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Cats with pontile lesions display an abnormal grooming behavior that waxes and wanes during the year. Data are presented indicating that the abnormal behavior is mediated by serotonergic neurons in the superior colliculus. Manipulations of 5-hydroxytryptamine metabolism were made systemically, as well as locally in the superior colliculus, in normal cats and in cats with pontile lesions. 5-hydroxytryptophan administration abolished the abnormal behavior, and p-chlorophenylalanine administration induced the abnormal behavior in cats with pontile lesions; but p-chlorophenylalanine administration to normal cats did not induce the abnormal behavior. The results indicate that the pontile lesion produces at least 2 critical deficits that induce the abnormal behavior. Previous data indicated that another critical deficit is in glucocorticoid function.

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“…Brown and Remley (1971) examined the effects of septal lesions on escape from or avoidance of sources of various stimuli and found that the lesions increased the subjects' reactivity to thermal, auditory, and tactile (footshock) stimuli but not to gustatory (saccharin and quinine) or visual stimuli. Var-ious authors have also presented electrophysiological and anatomical evidence supporting the hypothesized role of the septum in sensory processing (e.g., Golden & Lubar, 1971;Powell, Furlong, & Hatton, 1970;Powell & Hoelle, 1967).…”

mentioning

confidence: 92%

Enhanced cue function of olfactory stimulation in mice with septal lesions.

Carlson¹,

Vallante²

1974

Journal of Comparative and Physiological Psychology

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Normal mice and mice with septal lesions were trained on a go/no-go discrimination task (multiple fixed interval of 15 sec., 15-seo. extinction schedule). When the discriminative stimulus (the one which indicated to the subject whether responding at the end of the interval would be reinforced) was a pellet of food (delivered at the start of the interval) or odor of food or non-nutritive substance (present throughout the 15-sec. interval), acquisition of septum-damaged mice was enhanced. These lesions did not, however, alter performance when the discrimination was cued by a buzzer or flashing light. The results suggest that septal lesions produce an increased reactivity to olfactory stimuli and to stimuli associated with the delivery of food reinforcement.

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Septotectal projections in the cat

Cited by 34 publications

References 8 publications

Relationships between the superior colliculus and hippocampus: Neural and behavioral considerations

Relationships between the superior colliculus and hippocampus: Neural and behavioral considerations

5-hydroxytryptamine metabolism, superior colliculus, and grooming behavior in cats with pontile lesions.

Enhanced cue function of olfactory stimulation in mice with septal lesions.

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