The Fish Telencephalon and Its Relation to Learning

Savage, George E.

doi:10.1007/978-1-4613-2988-6_6

Cited by 31 publications

(25 citation statements)

References 136 publications

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“…Briefly, learning in teleost fish can encompass non-associative processes (i.e. habituation, sensitisation, pseudoconditioning), associative processes (classical conditioning, operant conditioning, avoidance learning), integrative processes (transfer of control, successive reversal learning) and interactive learning processes (Savage, 1980;Overmier and Hollis, 1983;Topál and Csányi, 1999). Most of those learning processes can be facilitated by noxious stimuli, such as electric shocks, and are modulated by telencephalon ablation.…”

Section: Nociception the Telencephalon And Pain Perceptionmentioning

confidence: 99%

Can fish suffer?: perspectives on sentience, pain, fear and stress

Chandroo

Duncan

Moccia

2004

Applied Animal Behaviour Science

338

165

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In contrast to other major forms of livestock agriculture, there is a paucity of scientific information on the welfare of fish raised under intensive aquacultural conditions. This reflects an adherence to the belief that these animals have not evolved the salient biological characteristics that are hypothesised to permit sentience. In this review, we evaluate the scientific evidence for the existence of sentience in fish, and in particular, their ability to experience pain, fear and psychological stress. Teleost fish are considered to have marked differences in some aspects of brain structure and organization as compared to tetrapods, yet they simultaneously demonstrate functional similarities and a level of cognitive development suggestive of sentience. Anatomical, pharmacological and behavioural data suggest that affective states of pain, fear and stress are likely to be experienced by fish in similar ways as in tetrapods. This implies that fish have the capacity to suffer, and that welfare consideration for farmed fish should take these states into account. We suggest that the concept of animal welfare can be applied legitimately to fish. It is therefore appropriate to recognize and study the welfare of farmed fish.

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Section: Nociception the Telencephalon And Pain Perceptionmentioning

confidence: 99%

Can fish suffer?: perspectives on sentience, pain, fear and stress

Chandroo

Duncan

Moccia

2004

Applied Animal Behaviour Science

338

165

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“…Catfish are relatively well studied teleosts with re spect to cerebellar physiology [Reid and Westerman, 1975a, b;Kotchabhakdi, 1976;Paul, 1982;Tong and Bullock, 1982;Crispino, 1983;Lee, 1984;Lee andBullock, 1984, 1990] and anatomy [Finger, 1978a[Finger, , b, 1983, telencephalic nuclear regions [Northcutt and Braford, 1980;Northcutt, 1981;Echteler and Saidel, 1981] and their role in the plasticity of behavior [Hol lis and Overmier, 1978;De Bruin, 1980;Savage, 1980;Overmier and Hollis, 1983]. This does not mean that they are typical or representative of their class, but silurids are considered to be generalized in some re spects, rather than strikingly unusual or specialized.…”

Section: Discussionmentioning

confidence: 99%

Cerebellar Units Show Several Types of Long-Lasting Posttetanic Responses to Telencephalic Stimulation in Catfish

Lee

Bullock²

1990

Brain Behav Evol

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Extracellular spikes from Purkinje and eurydendroid cells as well as evoked field potentials were recorded from the cerebellum in a catfish following trains of 50–100 stimuli at 2–10 Hz delivered to the area dorsalis centralis (Dc) of the telencephalon. Forty out of 48 Purkinje cells tested showed some response, either an increase or a decrease in the level of ongoing spike discharge following the 10- to 25-second tetanic pulse trains. The altered level lasted for > 3 min. Four out of 16 eurydendroid cells showed an increase in posttrain ongoing discharge; none showed a decrease. In those Purkinje cells responding to single pulse stimulation with early excitation, that response was converted to early inhibition during the later cycles of a tetanic pulse train. When tested with posttrain stimulation, they resumed the pretrain early excitation about 100 s after the train; before that, the recovery stages are complex, neither a simple continuation of, nor a simple rebound from, the later cycles of the stimulus train. Bursting discharge of Purkinje cells is often induced or, if already present, enhanced and regularized, typically at approximately 3/s, by train stimulation of Dc. This pattern begins during the train but continues for tens of seconds after its end. The effects of a stimulus train on the mean frequency and on the pattern of ongoing discharge depend on the train parameters: intensity, duration and stimulus rate within the train; 4–5 Hz is most effective. Higher rates or repeated trains produce a more intense but shorter-lasting effect. Evoked field potentials change during a train, and posttrain test stimuli show a slow recovery, especially after longer pulse trains. The cerebrocerebellar influence in a teleost is nontrivial, widespread, differentiated and shows long-lasting posttetanic plasticity.

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“…The use of more precise techniques and experimental procedures revealed evidence that the forebrain in teleost fish is involved in emotional, social and, reproductive behavior, as well as in learning and memory (e.g., Flood & Overmier, 1981;Overmier & Hollis, 1983Savage, 1980). In conjunction with this evidence, other neuroethological, comparative, developmental and neuroanatomical evidence lead to a different understanding of vertebrate brain evolution.…”

Section: Evolution Of the Brain And Behavior In Vertebrates: From Fismentioning

confidence: 99%

Mecanismos neuronales del aprendizaje en los peces teleósteos

Hurtado-Parrado¹

2010

Univ Psychol

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a b s t r a C tTwo predominant approaches for studying the neurobiology of learning in fish are reviewed: brain lesions and chemical stimulation. Habituation, sensitization, Pavlovian Conditioning, spatial behavior, and emotional learning are the specific processes analyzed. Regarding the effect of brain lesions, telencephalic ablations produced impairment of habituation learning; conversely, cerebellum lesions caused deficiencies in classical conditioning of eye-retraction and spatial learning (similar effects observed in mammals suggest that the functions of the cerebellum may have evolved early in vertebrate history). Medium Pallium (MP) areas have been identified as critical for emotional learning in fish. Furthermore, neurobehavioral functions of MP seem to be similar to the functions of the amygdala in mammals. Relating to neurochemical processes, NMDA receptor antagonists affected the acquisition of avoidance and fear conditioning in a dose-dependent manner. Alternatively, Nitric Oxide (NO) and cyclic Guanosine Monophosphate (cGMP) seem to be involved in the consolidation process of emotional learning. Keywords authorNeurobehavioral functions, neurochemical functioning, teleost fish, learning processes, spatial learning, Medium Lateral Pallium. Keywords plusTeleost Fish, Neurochemistry, Cerebrum, Injuries. r e s u m e n Se revisaron dos aproximaciones al estudio de la neurobiología del aprendizaje en peces teleósteos: lesiones cerebrales y estimulación química. Respecto al efecto de lesiones cerebrales, la literatura reporta que las ablaciones del telencéfalo producen deficiencias en habituación, mientras que las lesiones en el cerebelo afectan el condicionamiento clásico de retracción ocular y aprendizaje espacial (efectos similares observados en mamíferos sugieren que las funciones del cerebelo pudieron haber evolucionado tempranamente en la historia de los vertebrados). Áreas del Medium Pallium (MP) parecen ser vitales en el aprendizaje emocional de los peces; más aún, las funciones del MP aparentan ser similares a las de la amígdala en mamíferos. Con respecto a procesos neuroquímicos, los antagonistas de los receptores NMDA, mostraron afectar la adquisición de condicionamiento de evitación y miedo. Por último, el óxido nítrico y el guanosín monofosfato cíclico han sido relacionados con los procesos de consolidación del aprendizaje emocional. Palabras clave autorFuncionamiento neuroquímico, peces teleósteos, aprendizaje espacial, procesos de aprendizaje, Medium Pallium Lateral.

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The Fish Telencephalon and Its Relation to Learning

Cited by 31 publications

References 136 publications

Can fish suffer?: perspectives on sentience, pain, fear and stress

Can fish suffer?: perspectives on sentience, pain, fear and stress

Cerebellar Units Show Several Types of Long-Lasting Posttetanic Responses to Telencephalic Stimulation in Catfish

Mecanismos neuronales del aprendizaje en los peces teleósteos

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