scholarly journals Attention-related modulation of caudate neurons depends on superior colliculus activity

eLife ◽  
2020 ◽  
Vol 9 ◽  
Author(s):  
James P Herman ◽  
Fabrice Arcizet ◽  
Richard J Krauzlis
Keyword(s):  
Basal Ganglia ◽  
Superior Colliculus ◽  
Visual Processing ◽  
Subcortical Structures ◽  
Traditional Role ◽  
Attention Task ◽  
Midbrain Structure ◽  
The Brain ◽  
Caudate Nucleus Head

Recent work has implicated the primate basal ganglia in visual perception and attention, in addition to their traditional role in motor control. The basal ganglia, especially the caudate nucleus ‘head’ (CDh) of the striatum, receive indirect anatomical connections from the superior colliculus (SC), a midbrain structure that is known to play a crucial role in the control of visual attention. To test the possible functional relationship between these subcortical structures, we recorded CDh neuronal activity of macaque monkeys before and during unilateral SC inactivation in a spatial attention task. SC inactivation significantly altered the attention-related modulation of CDh neurons and strongly impaired the classification of task-epochs based on CDh activity. Only inactivation of SC on the same side of the brain as recorded CDh neurons, not the opposite side, had these effects. These results demonstrate a novel interaction between SC activity and attention-related visual processing in the basal ganglia.

scholarly journals Attention-related modulation of caudate neurons depends on superior colliculus activity

2019 ◽  
Author(s):  
James P. Herman ◽  
Fabrice Arcizet ◽  
Richard J. Krauzlis
Keyword(s):  
Basal Ganglia ◽  
Superior Colliculus ◽  
Visual Processing ◽  
Functional Relationship ◽  
Subcortical Structures ◽  
Traditional Role ◽  
Attention Task ◽  
Midbrain Structure ◽  
Caudate Nucleus Head

AbstractRecent work has implicated the basal ganglia in visual perception and attention, in addition to their traditional role in motor control. The basal ganglia, especially the caudate nucleus “head” (CDh) of the striatum, receive indirect anatomical connections from the superior colliculus, a midbrain structure that is known to play a crucial role in the control of visual attention. To test the possible functional relationship between these subcortical structures, we recorded CDh neuronal activity before and during unilateral SC inactivation in a spatial attention task. SC inactivation significantly altered the attention-related modulation of CDh neurons and strongly impaired the classification of task epochs based on CDh activity. Only inactivation of the same-side of SC as recorded CDh neurons, not the opposite-side, had these effects. These results demonstrate a novel interaction between SC activity and attention-related visual processing in the basal ganglia.

Subcortical structures: the cerebellum, basal ganglia, and thalamus

2010 ◽  
pp. 4871-4879
Author(s):  
Mark J. Edwards ◽  
Penelope Talelli
Keyword(s):  
Spinal Cord ◽  
Nervous System ◽  
Basal Ganglia ◽  
Movement Disorders ◽  
Subcortical Structures ◽  
Video Material ◽  
The Brain ◽  
Relay Stations

For video material relating to movement disorders, please go to Movement Disorders Videos. Less is known of the function of the cerebellum, thalamus and basal ganglia than of other structures in the brain, but there is an increasing appreciation of their complex role in motor and nonmotor functions of the entire nervous system. These structures exercise functions that far exceed their previously assumed supporting parts as simple ‘relay stations’ between cortex and spinal cord....

Subcortical structures: The cerebellum, basal ganglia, and thalamus

2020 ◽  
pp. 5937-5945
Author(s):  
Mark J. Edwards ◽  
Penelope Talelli
Keyword(s):  
Spinal Cord ◽  
Nervous System ◽  
Cerebral Cortex ◽  
Basal Ganglia ◽  
Feedback Loops ◽  
Sense Organs ◽  
Subcortical Structures ◽  
Stretch Receptors ◽  
The Brain ◽  
Relay Stations

Less is known of the function of the cerebellum, thalamus, and basal ganglia than of other structures in the brain, but there is an increasing appreciation of their complex role in motor and non-motor functions of the entire nervous system. These structures exercise functions that far exceed their previously assumed supporting parts as simple ‘relay stations’ between cortex and spinal cord. The subcortical structures receive massive different inputs from the cerebral cortex and peripheral sense organs and stretch receptors. Through recurrent feedback loops this information is integrated and shaped to provide output which contributes to scaling, sequencing, and timing of movement, as well as learning and automatization of motor and non-motor behaviours.

scholarly journals Analysis of the connection of the concentration of iron in basal nuclei with cognitive impairments in patients with hypertension and atherosclerotic encephalopathy in the study of changes in the magnetic susceptibility of the subcortical structures of the

2018 ◽  
pp. 19-25
Author(s):  
M. Petrenko ◽  
S. Grabovetskii
Keyword(s):  
Basal Ganglia ◽  
Vascular Diseases ◽  
Main Group ◽  
Specific Pattern ◽  
Control Group ◽  
Subcortical Structures ◽  
Normal Range ◽  
Basal Nuclei ◽  
Subcortical Nuclei ◽  
The Brain

Vascular diseases of the brain are an important medical and social problem that negatively affects the economy of the country and the life of society as a whole. Discirculatory encephalopathy refers to slowly progressing disorders of the cerebral circulation, in which development of an essential role is played by hypertension, atherosclerosis, diabetes mellitus and other diseases that affect the vessels of the brain. The purpose of the study was to identify a specific pattern of iron accumulation in the subcortical structures of the brain of hypertensive and atherosclerotic encephalopathy patients to improve the diagnostic criteria for the development of cognitive impairment. For the study, 20 patients in the main group with a diagnosis of hypertensive and atherosclerotic encephalopathy were selected, and the control group consisted of 20 patients, the results of which neuropsychiatric tests were within the normal range. According to the results of the study, the accumulation of iron in the basal ganglia is higher in patients with the main group compared with the control group. The exact mechanism for increasing the concentration of iron in the basal ganglia of the patients in the main group is not known, but this study confirms that deposition of subcutaneous iron may be used as a biomarker for early diagnosis of vascular dementia that develops against the background of hypertensive and atherosclerotic encephalopathy. The results of the study reliably established the existence of a negative correlation between hypointensity of subcortical nuclei and neuropsychological parameters in patients with the main group.

scholarly journals Analysis of the connection of the concentration of iron in basal nuclei with cognitive impairments in patients with hypertension and atherosclerotic encephalopathy in the study of changes in the magnetic susceptibility of the subcortical structures

2018 ◽  
pp. 15-21
Author(s):  
M. Petrenko ◽  
S. Grabovetskii
Keyword(s):  
Basal Ganglia ◽  
Vascular Diseases ◽  
Main Group ◽  
Specific Pattern ◽  
Control Group ◽  
Subcortical Structures ◽  
Normal Range ◽  
Basal Nuclei ◽  
Subcortical Nuclei ◽  
The Brain

Vascular diseases of the brain are an important medical and social problem that negatively affects the economy of the country and the life of society as a whole. Discirculatory encephalopathy refers to slowly progressing disorders of the cerebral circulation, in which development of an essential role is played by hypertension, atherosclerosis, diabetes mellitus and other diseases that affect the vessels of the brain. The purpose of the study was to identify a specific pattern of iron accumulation in the subcortical structures of the brain of hypertensive and atherosclerotic encephalopathy patients to improve the diagnostic criteria for the development of cognitive impairment. For the study, 20 patients in the main group with a diagnosis of hypertensive and atherosclerotic encephalopathy were selected, and the control group consisted of 20 patients, the results of which neuropsychiatric tests were within the normal range. According to the results of the study, the accumulation of iron in the basal ganglia is higher in patients with the main group compared with the control group. The exact mechanism for increasing the concentration of iron in the basal ganglia of the patients in the main group is not known, but this study confirms that deposition of subcutaneous iron may be used as a biomarker for early diagnosis of vascular dementia that develops against the background of hypertensive and atherosclerotic encephalopathy.The results of the study reliably established the existence of a negative correlation between hypointensity of subcortical nuclei and neuropsychological parameters in patients with the main group.

Comparison of the Basal Ganglia and Cerebellum in Shifting Attention.

2001 ◽  
Vol 13 (3) ◽  
pp. 285-297 ◽  
Author(s):  
Susan M. Ravizza ◽  
Richard B. Ivry
Keyword(s):  
Basal Ganglia ◽  
Attentional Control ◽  
Motor Performance ◽  
Subcortical Structures ◽  
Attention Shifting ◽  
Cerebellar Dysfunction ◽  
Attention Task ◽  
Attentional Deficits ◽  
Cerebellar Lesions ◽  
Neurological Insult

The basal ganglia and cerebellum have traditionally been associated with motor performance. Recently, there has been considerable interest regarding the contributions of these subcortical structures to aspecdts of cognition. In particular, both the basal ganglia and cerebellum have been hypothesized to be involved in the control of attentional set. To dat, no neuropsychological studies have directly compared the effects of basal ganglia and cerebellar dysfunction on the same attention shifting tasks. To this end, dwe employed and alternating attention task that has been used to demonstrate putative attentional control deficits in children with cerebellar pathology, either related to autism or neurological insult. When adult patients with either Parkinson's disease or cerebellar lesions were tested on this task, a similar pattern of deficits was observed for both groups. However, when the motor demands were reduced, cerebellar patients showed a significant improvement on the alternating attention task, whereas the Parkinson patients continued to exhibit an impairment. This dissociation suggests that attentional deficits reported previously as being due to cerebellar dysfunction may be, at least in part, secondary to problem related to coordinating successive responses. In contrast, attention-shifting deficits associated with basal ganglia impairment cannot be explained by recourse to the motor demands of the task.

The brain in evolution and involution

1997 ◽  
Vol 75 (6) ◽  
pp. 651-667 ◽  
Author(s):  
André Parent
Keyword(s):  
Basal Ganglia ◽  
Substantia Nigra ◽  
Functional Organization ◽  
Current Model ◽  
Brain Structures ◽  
Subcortical Structures ◽  
Severe Motor ◽  
Cortical Inputs ◽  
Neuronal Systems ◽  
The Brain

This paper provides an overview of the phylogenetic evolution and structural organization of the basal ganglia. These large subcortical structures that form the core of the cerebral hemispheres directly participate in the control of psychomotor behavior. Neuroanatomical methods combined with transmitter localization procedures were used to study the chemical organization of the forebrain in each major group of vertebrates. The various components of the basal ganglia appear well developed in amniote vertebrates, but remain rudimentary in anamniote vertebrates. For example, a typical substantia nigra composed of numerous dopaminergic neurons that project to the striatum already exists in the brain of reptiles. Other studies in mammals show that glutamatergic cortical inputs establish distinct functional territories within the basal ganglia, and that neurons in each of these territories act upon other brain neuronal systems principally via a GABAergic disinhibitory output mechanism. The functional status of the various basal ganglia chemospecific systems was examined in animal models of neurodegenerative diseases, as well as in postmortem material from Parkinson's and Huntington's disease patients. The neurodegenerative processes at play in such conditions specifically target the most phylogenetically ancient components of the brain, including the substantia nigra and the striatum, and the marked involution of these brain structures is accompanied by severe motor and cognitive deficits. Studies of neural mechanisms involved in these akinetic and hyperkinetic disorders have led to a complete reevaluation of the current model of the functional organization of the basal ganglia in both health and disease. Key words: brain phylogeny, basal ganglia, neurotransmitters, neurodegenerative disorders.

scholarly journals Who dominates who in the dark basements of the brain?

2007 ◽  
Vol 30 (1) ◽  
pp. 104-105
Author(s):  
Tony J. Prescott ◽  
Mark D. Humphries
Keyword(s):  
Basal Ganglia ◽  
Superior Colliculus ◽  
Reticular Formation ◽  
The Brain

Subcortical substrates for behavioural integration include the fore/midbrain nuclei of the basal ganglia and the hindbrain medial reticular formation. The midbrain superior colliculus requires basal ganglia disinhibition in order to generate orienting movements. The colliculus should therefore be seen as one of many competitors vying for control of the body's effector systems with the basal ganglia acting as the key arbiter.

scholarly journals The mouse cortico-tectal projectome

2020 ◽  
Author(s):  
Nora L. Benavidez ◽  
Michael S. Bienkowski ◽  
Neda Khanjani ◽  
Ian Bowman ◽  
Marina Fayzullina ◽  
...  
Keyword(s):  
Structural Foundation ◽  
Superior Colliculus ◽  
Neuronal Cell ◽  
Cell Types ◽  
Input Output ◽  
Midbrain Structure ◽  
Cortical Inputs ◽  
Computational Analyses ◽  
The Brain

SUMMARYThe superior colliculus (SC) is a midbrain structure that receives diverse and robust cortical inputs to drive a range of cognitive and sensorimotor behaviors. However, it remains unclear how descending cortical inputs arising from higher-order associative areas coordinate with SC sensorimotor networks to influence its outputs. In this study, we constructed a comprehensive map of all cortico-tectal projections and identified four collicular zones with differential cortical inputs: medial (SC.m), centromedial (SC.cm), centrolateral (SC.cl) and lateral (SC.l). Computational analyses revealed that cortico-tectal projections are organized as multiple subnetworks that are consistent with previously identified cortico-cortical and cortico-striatal subnetworks. Furthermore, we delineated the brain-wide input/output organization of each collicular zone and described a subset of their constituent neuronal cell types based on distinct connectional and morphological features. Altogether, this work provides a novel structural foundation for the integrative role of the SC in controlling cognition, orientation, and other sensorimotor behaviors.

Ultrastructure of developing visual cortical synapses in the cat superior colliculus

1991 ◽  
Vol 49 ◽  
pp. 156-157
Author(s):  
Caroline A. Miller ◽  
Laura L. Bruce
Keyword(s):  
Superior Colliculus ◽  
Phosphate Buffer ◽  
Receptive Fields ◽  
Visual Cortical Area ◽  
Cortical Synapses ◽  
Visual Cortical ◽  
And Function ◽  
Phosphate Buffered Saline ◽  
The Brain ◽  
Cat Superior Colliculus

The first visual cortical axons arrive in the cat superior colliculus by the time of birth. Adultlike receptive fields develop slowly over several weeks following birth. The developing cortical axons go through a sequence of changes before acquiring their adultlike morphology and function. To determine how these axons interact with neurons in the colliculus, cortico-collicular axons were labeled with biocytin (an anterograde neuronal tracer) and studied with electron microscopy.Deeply anesthetized animals received 200-500 nl injections of biocytin (Sigma; 5% in phosphate buffer) in the lateral suprasylvian visual cortical area. After a 24 hr survival time, the animals were deeply anesthetized and perfused with 0.9% phosphate buffered saline followed by fixation with a solution of 1.25% glutaraldehyde and 1.0% paraformaldehyde in 0.1M phosphate buffer. The brain was sectioned transversely on a vibratome at 50 μm. The tissue was processed immediately to visualize the biocytin.

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