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... patient’s field of vision. The pencil is held a few inches from the patient’s face outside of his field of vision and is moved forward to it. For accurate testing of cooperative patients the peripheral portions of the field are explored on a perimeter with the aid of an arc which can be turned in a ...
... patient’s field of vision. The pencil is held a few inches from the patient’s face outside of his field of vision and is moved forward to it. For accurate testing of cooperative patients the peripheral portions of the field are explored on a perimeter with the aid of an arc which can be turned in a ...
Nerve Conduction Studies - Cumbria Partnership NHS Foundation
... What happens during nerve conduction studies? In this test, several electrodes are attached to your skin with tape or a special paste. The electrodes can be stickon or made of small felt pads soaked in salt water solution. Felt electrodes are usually mounted in a plastic holder and kept in place wit ...
... What happens during nerve conduction studies? In this test, several electrodes are attached to your skin with tape or a special paste. The electrodes can be stickon or made of small felt pads soaked in salt water solution. Felt electrodes are usually mounted in a plastic holder and kept in place wit ...
Pupilllary Light Reflex Pathways
... contraction anisocoria occurs (direct PLR > indirect PLR) due to unequal decussation of fibers at chiasm and again after pre-tectal nuclei. PLR evaluation should also include the “swinging flashlight test” in which light is alternately shifted from one eye to other A normal response is characterize ...
... contraction anisocoria occurs (direct PLR > indirect PLR) due to unequal decussation of fibers at chiasm and again after pre-tectal nuclei. PLR evaluation should also include the “swinging flashlight test” in which light is alternately shifted from one eye to other A normal response is characterize ...
Basal Ganglia
... BG is especially involved in determining what motor programs are selected and called into action. This occurs through BG regulation of VA thalamic projections to area 6 (pre-motor cortex). BG output to VA provides a critical “go” signal for initiation of motor programs stored in the premotor corte ...
... BG is especially involved in determining what motor programs are selected and called into action. This occurs through BG regulation of VA thalamic projections to area 6 (pre-motor cortex). BG output to VA provides a critical “go” signal for initiation of motor programs stored in the premotor corte ...
Finding a face in the crowd: parallel and serial neural mechanisms
... Behavioral studies of attention during visual search have led to the distinction between serial and parallel mechanisms of selection. To find a target object in a crowded scene, for example a ‘‘face in a crowd’’, the visual system might turn on and off the neural representation of each object in a se ...
... Behavioral studies of attention during visual search have led to the distinction between serial and parallel mechanisms of selection. To find a target object in a crowded scene, for example a ‘‘face in a crowd’’, the visual system might turn on and off the neural representation of each object in a se ...
Some Speculative Hypotheses about the Nature
... eyes are fixed and the body adjusts to keep the object within view. I would therefore like to suggest that the mechanisms for tracking a moving target — eyes, head or attention — form a continuum and as such share a common neural network, which predicts the trajectory of the moving target. While man ...
... eyes are fixed and the body adjusts to keep the object within view. I would therefore like to suggest that the mechanisms for tracking a moving target — eyes, head or attention — form a continuum and as such share a common neural network, which predicts the trajectory of the moving target. While man ...
From hand actions to speech: evidence and speculations
... of subdural electrodes were placed over the left temporal lobe and adjacent supra‐ Sylvian region. Electrical stimulation of Brocaʹs area produced marked interference with language output functions including speech arrest, slowing of oral reading, paraphasia and anomia. However, the ...
... of subdural electrodes were placed over the left temporal lobe and adjacent supra‐ Sylvian region. Electrical stimulation of Brocaʹs area produced marked interference with language output functions including speech arrest, slowing of oral reading, paraphasia and anomia. However, the ...
The Nervous System
... – There are 2 types of somatic sensory receptors: detect information about the outside world or our physical position within it • External receptor (Exteroceptors): provide information about the external environment in the form of touch, temperature, pressure sensation, sight, smell, and hearing • P ...
... – There are 2 types of somatic sensory receptors: detect information about the outside world or our physical position within it • External receptor (Exteroceptors): provide information about the external environment in the form of touch, temperature, pressure sensation, sight, smell, and hearing • P ...
CreutzFeldt-JAkob dISeASe (CJd)
... between neurons in the brain). When this condition affects neurons close to the infection site, there is a reduction of inflammatory reaction that makes diagnosis difficult. These degenerations of brain functions through the loss of healthy spongiform and neurons can be seen as the patient’s mental ...
... between neurons in the brain). When this condition affects neurons close to the infection site, there is a reduction of inflammatory reaction that makes diagnosis difficult. These degenerations of brain functions through the loss of healthy spongiform and neurons can be seen as the patient’s mental ...
From swimming to walking with a salamander robot
... P. waltlii. Nonetheless, considering the relatively simple design of the robot, its overall performance captures many elements of the salamander’s locomotor behavior. Lateral turning can be induced during both walking and swimming by applying asymmetrical drives between left and right sides of the b ...
... P. waltlii. Nonetheless, considering the relatively simple design of the robot, its overall performance captures many elements of the salamander’s locomotor behavior. Lateral turning can be induced during both walking and swimming by applying asymmetrical drives between left and right sides of the b ...
neuro 04 brainstem student
... In general, the brainstem is made up of a mixture of long fiber pathways, wellorganized nuclei, and a network of cells which forms the brainstem reticular formation. Most of the nuclei are related directly either to cranial nerve functions or to motor control pathways. 10 of 12 cranial nerves ente ...
... In general, the brainstem is made up of a mixture of long fiber pathways, wellorganized nuclei, and a network of cells which forms the brainstem reticular formation. Most of the nuclei are related directly either to cranial nerve functions or to motor control pathways. 10 of 12 cranial nerves ente ...
PDF
... The following day, four-vessel angiography was performed, prompted by a diagnostic impression of "arteritis." The presence of atlanto-axial subluxation was not communicated to the neuroradiologist so that the study was performed in the usual hyperflexed position, causing maximum anterior displacemen ...
... The following day, four-vessel angiography was performed, prompted by a diagnostic impression of "arteritis." The presence of atlanto-axial subluxation was not communicated to the neuroradiologist so that the study was performed in the usual hyperflexed position, causing maximum anterior displacemen ...
Neural networks underlying parietal lobe seizures: A
... according to Talairach’s stereotactic method (Bancaud et al., 1970; Talairach et al., 1992), as illustrated in Fig. 1b. The anatomical targeting of electrodes was established in each patient according to available non-invasive information and hypotheses about the localization of the epileptogenic zo ...
... according to Talairach’s stereotactic method (Bancaud et al., 1970; Talairach et al., 1992), as illustrated in Fig. 1b. The anatomical targeting of electrodes was established in each patient according to available non-invasive information and hypotheses about the localization of the epileptogenic zo ...
Cavernous Malformations: A Literature Review and Case Study
... cavernomas represent a formidable treatment challenge because of their location within a parenchyma that has critical neurological functions, rendering them much more difficult to remove than those in other locations” (p.68). The location of the CM can determine the type of surgery to be done. Repea ...
... cavernomas represent a formidable treatment challenge because of their location within a parenchyma that has critical neurological functions, rendering them much more difficult to remove than those in other locations” (p.68). The location of the CM can determine the type of surgery to be done. Repea ...
The Receptive Fields of Inferior Temporal Cortex Neurons in Natural
... This resulted in a large number of firing rate measurements, each of which was at a given distance from the effective visual stimulus for the cell. [The distance from the target object (S⫹) and the distractor object (S⫺) is plotted in Figure 2. It is clear when the monkey found the target, because a ...
... This resulted in a large number of firing rate measurements, each of which was at a given distance from the effective visual stimulus for the cell. [The distance from the target object (S⫹) and the distractor object (S⫺) is plotted in Figure 2. It is clear when the monkey found the target, because a ...
The Spinal Cord and Spinal Nerves
... The anterior median fissure and posterior median sulcus penetrate the white matter & dendrites into right and left side ii. The gray matter is shaped like the letter ‘H’ or a butterfly and is surrounded by the white matter. a. Gray matter consists primarily of cell bodies of neurons and neuroglia, u ...
... The anterior median fissure and posterior median sulcus penetrate the white matter & dendrites into right and left side ii. The gray matter is shaped like the letter ‘H’ or a butterfly and is surrounded by the white matter. a. Gray matter consists primarily of cell bodies of neurons and neuroglia, u ...
Mental Imagery in Spinal Cord Injury: A Systematic Review
... Background: The immense potential of structural and functional reorganization of central nervous system i.e., neuro-plasticity following any injury serves the key mechanism behind the recovery of sensory-motor functions. One of the ways of enhancing this reorganization is through the technique of me ...
... Background: The immense potential of structural and functional reorganization of central nervous system i.e., neuro-plasticity following any injury serves the key mechanism behind the recovery of sensory-motor functions. One of the ways of enhancing this reorganization is through the technique of me ...
How and Why Brains Create Meaning from Sensory Information
... the entire available brain [Freeman, 1999]. The construction begins with formation within the brain of a pattern of neural activity that embodies its immediate goal, such as food, shelter or a mate, the achievement of which requires acquisition of information from the environment. That information i ...
... the entire available brain [Freeman, 1999]. The construction begins with formation within the brain of a pattern of neural activity that embodies its immediate goal, such as food, shelter or a mate, the achievement of which requires acquisition of information from the environment. That information i ...
Eagleman Ch 7. The Motor System
... structures deep within the white matter. The basal ganglia initiate and maintain activity in the cortex. ...
... structures deep within the white matter. The basal ganglia initiate and maintain activity in the cortex. ...
Human Anatomy, First Edition McKinley&O'Loughlin
... your left arm contract to pull your left hand away from a hot object Contralateral is when the sensory impulses from a receptor organ cross over through the spinal cord to activate effector organs in the opposite limb. for example, contralateral effect occurs when you step on a sharp object with y ...
... your left arm contract to pull your left hand away from a hot object Contralateral is when the sensory impulses from a receptor organ cross over through the spinal cord to activate effector organs in the opposite limb. for example, contralateral effect occurs when you step on a sharp object with y ...
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.