The Central Nervous System
... • Hydrocephaly- ‘water on the brain’. • CSF is normally drained at a constant rate from the brain. Any obstruction may lead to accumulation with pressure build up in the cranium and exerts pressure on the brain tissue. • In an infant with unclosed fontanels, the fluid will escape to enlarge the head ...
... • Hydrocephaly- ‘water on the brain’. • CSF is normally drained at a constant rate from the brain. Any obstruction may lead to accumulation with pressure build up in the cranium and exerts pressure on the brain tissue. • In an infant with unclosed fontanels, the fluid will escape to enlarge the head ...
Organization of the Nervous System and Motor unit BY
... 3 Axon hillock بروزat which nerve impulses begin &pass in one direction from soma to the axon( nerve fiber) then to axon terminal. 4-Axon and axon terminal end on skeletal muscle via neuromuscular junction Nerve cell axons are very thin, about 1 micrometer. However, they are extraordinarily long. ...
... 3 Axon hillock بروزat which nerve impulses begin &pass in one direction from soma to the axon( nerve fiber) then to axon terminal. 4-Axon and axon terminal end on skeletal muscle via neuromuscular junction Nerve cell axons are very thin, about 1 micrometer. However, they are extraordinarily long. ...
Alterations to multisensory and unisensory integration by stimulus
... were 100- to 200-ms duration, 4° ⫻ 1° moving bars of light (1.68 – 13.67 cd/m2) of optimal velocity for each neuron and presented against a uniform gray background (0.16 cd/m2). When a “withinmodal” pair of visual stimuli was presented, the two bars of light had a horizontal separation of 5°. During ...
... were 100- to 200-ms duration, 4° ⫻ 1° moving bars of light (1.68 – 13.67 cd/m2) of optimal velocity for each neuron and presented against a uniform gray background (0.16 cd/m2). When a “withinmodal” pair of visual stimuli was presented, the two bars of light had a horizontal separation of 5°. During ...
Forward Prediction in the Posterior Parietal Cortex and Dynamic
... Most studies in sensorimotor neurophysiology have utilized reactive movements to stationary goals pre-defined by sensory cues (Figure 1A left), but this approach is fundamentally incapable of determining whether the observed neural activity reflects sensory stimuli or predicts future states. Explori ...
... Most studies in sensorimotor neurophysiology have utilized reactive movements to stationary goals pre-defined by sensory cues (Figure 1A left), but this approach is fundamentally incapable of determining whether the observed neural activity reflects sensory stimuli or predicts future states. Explori ...
Temporal Firing Patterns of Purkinje Cells in the Cerebellar Ventral
... the movement trajectory (Craig 1989). Although a forward model has been used to analyze the instantaneous firing frequency associated with some movements in previous studies (Berthier et al. 1991; Krauzlis and Lisberger 1994), it suffers from the fundamental difficulty that the movement cannot be pr ...
... the movement trajectory (Craig 1989). Although a forward model has been used to analyze the instantaneous firing frequency associated with some movements in previous studies (Berthier et al. 1991; Krauzlis and Lisberger 1994), it suffers from the fundamental difficulty that the movement cannot be pr ...
The Functional Organization of Perception and Movement
... ascending axons and axons descending from the brain stem and neocortex that innervate spinal interneurons and motor neurons. The ventral columns also include ascending and descending axons. The ascending somatic sensory axons in the lateral and ventral columns constitute parallel pathways that conve ...
... ascending axons and axons descending from the brain stem and neocortex that innervate spinal interneurons and motor neurons. The ventral columns also include ascending and descending axons. The ascending somatic sensory axons in the lateral and ventral columns constitute parallel pathways that conve ...
T2 - Center for Neural Basis of Cognition
... Remapping allows humans and monkeys to perform a spatial memory task accurately. ...
... Remapping allows humans and monkeys to perform a spatial memory task accurately. ...
Spinal cord
... w/ the medulla at the base of the brain and extends about 17” to just below the last rib. (Ends at L1) Majority of the SC has the diameter of your thumb Thicker at the neck and end of the cord (cervical and lumbar enlargements) b/c of the large group of nerves connecting these regions of the cord w/ ...
... w/ the medulla at the base of the brain and extends about 17” to just below the last rib. (Ends at L1) Majority of the SC has the diameter of your thumb Thicker at the neck and end of the cord (cervical and lumbar enlargements) b/c of the large group of nerves connecting these regions of the cord w/ ...
Nerve activates contraction
... oblongata to the region of T12 Below T12 is the cauda equina (a collection of spinal nerves) Enlargements occur in the cervical and lumbar regions Where the nerves serving the upper and lower limbs arise and leave the cord ...
... oblongata to the region of T12 Below T12 is the cauda equina (a collection of spinal nerves) Enlargements occur in the cervical and lumbar regions Where the nerves serving the upper and lower limbs arise and leave the cord ...
File
... task management Working memory for object-recall tasks Solving complex, multitask problems ...
... task management Working memory for object-recall tasks Solving complex, multitask problems ...
Monitoring progression of primary progressive
... on many tests of language function. For some patients, this phase may last for a number of years. We have worked with several individuals whose professions involved heavy use of speech/language skills (e.g., writers and teachers) who were aware of problems in these areas for years before deficits we ...
... on many tests of language function. For some patients, this phase may last for a number of years. We have worked with several individuals whose professions involved heavy use of speech/language skills (e.g., writers and teachers) who were aware of problems in these areas for years before deficits we ...
Name
... specialized cell which is stimulated by a change in the environment. For example, some receptors in the skin are sensitive to heat, others to pressure, and so on. If stimulation of the receptor was significant enough to initiate an action potential in the afferent (sensory) neuron, the signal is tra ...
... specialized cell which is stimulated by a change in the environment. For example, some receptors in the skin are sensitive to heat, others to pressure, and so on. If stimulation of the receptor was significant enough to initiate an action potential in the afferent (sensory) neuron, the signal is tra ...
Funkcje ruchowe
... Cell activity in the motor cortex depends on whether a sequence of movements is guided by visual cues or by prior training. Monkeys were required to press three buttons either in a sequence presented by lighting three panels in turn or in a sequence they had learned previously. After being instructe ...
... Cell activity in the motor cortex depends on whether a sequence of movements is guided by visual cues or by prior training. Monkeys were required to press three buttons either in a sequence presented by lighting three panels in turn or in a sequence they had learned previously. After being instructe ...
a.Nerve Regeneration
... • Mature neurons do not divide • If damage to a neuron occurs to the axon and the cell body remains intact, cut or compressed axons can regenerate: – Post-trauma axon regrowth is never exactly the same as what existed before the injury – Much of the functional recovery after nerve injury involves re ...
... • Mature neurons do not divide • If damage to a neuron occurs to the axon and the cell body remains intact, cut or compressed axons can regenerate: – Post-trauma axon regrowth is never exactly the same as what existed before the injury – Much of the functional recovery after nerve injury involves re ...
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... The potential relationship between the type of representation of objects (e.g. viewer-centered) and how the organism may interact with those objects was further examined by reference to neurons in the STS which are selective for the sight of particular reaching actions (e.g. Perrett et al., 1989). I ...
... The potential relationship between the type of representation of objects (e.g. viewer-centered) and how the organism may interact with those objects was further examined by reference to neurons in the STS which are selective for the sight of particular reaching actions (e.g. Perrett et al., 1989). I ...
Body Systems Study Guide
... -The skeleton is made up of bones held together by cartilage. -Bones contain calcium. -The smallest bones are in the ear; the strongest bone in the body is the femur (thigh bone) Muscular System -The muscles in our body help us do many important things like: breathe, blink, walk, and grab things. -T ...
... -The skeleton is made up of bones held together by cartilage. -Bones contain calcium. -The smallest bones are in the ear; the strongest bone in the body is the femur (thigh bone) Muscular System -The muscles in our body help us do many important things like: breathe, blink, walk, and grab things. -T ...
new insights into the functions of the superior temporal cortex
... Unfortunately, only two of these five monkeys received a lesion at one location only. In all other animals in which Watson et al.2 made STS lesions, ablation was added to pre-existing brain lesions (of inferior parietal cortex in two cases, and of frontal cortex and corpus callosum in the third). On ...
... Unfortunately, only two of these five monkeys received a lesion at one location only. In all other animals in which Watson et al.2 made STS lesions, ablation was added to pre-existing brain lesions (of inferior parietal cortex in two cases, and of frontal cortex and corpus callosum in the third). On ...
“Congruent” and “Opposite” Neurons: Sisters for Multisensory
... However, multisensory integration is only half of the story of multisensory information processing, which works well when the sensory cues are originated from the same object. In cases where the sensory cues originate from different objects, the brain should segregate, rather than integrate, the cue ...
... However, multisensory integration is only half of the story of multisensory information processing, which works well when the sensory cues are originated from the same object. In cases where the sensory cues originate from different objects, the brain should segregate, rather than integrate, the cue ...
Allochiria
Allochiria (from the Greek meaning ""other hand"") is a neurological disorder in which the patient responds to stimuli presented to one side of their body as if the stimuli had been presented at the opposite side. It is associated with spatial transpositions, usually symmetrical, of stimuli from one side of the body (or of the space) to the opposite one. Thus a touch to the left arm will be reported as a touch to the right arm, which is also known as somatosensory allochiria. If the auditory or visual senses are affected, sounds (a person's voice for instance) will be reported as being heard on the opposite side to that on which they occur and objects presented visually will be reported as having been presented on the opposite side. Often patients may express allochiria in their drawing while copying an image. Allochiria often co-occurs with unilateral neglect and, like hemispatial neglect, the disorder arises commonly from damage to the right parietal lobe.Allochiria is often confused with alloesthesia, also known as false allochiria. True allochiria is a symptom of dyschiria and unilateral neglect. Dyschiria is a disorder in the localization of sensation due to various degrees of dissociation and cause impairment in one side causing the inability to tell which side of the body was touched.