Lesions of the corpus callosum: MRI findings and
... Glioblastoma multiforme (GBM) are the most common primary brain tumors in adults. They are the most aggressive type of glioma, usually supratentorial, which usually spread via direct extension along the white matter tracts, including the corpus callosum, resulting in a "butterfly pattern" by bihemis ...
... Glioblastoma multiforme (GBM) are the most common primary brain tumors in adults. They are the most aggressive type of glioma, usually supratentorial, which usually spread via direct extension along the white matter tracts, including the corpus callosum, resulting in a "butterfly pattern" by bihemis ...
Selective broad-band spatial frequency loss in contrast
... Purpose. Contrast sensitivity functions (CSFs) were measured under various optical conditions in healthy observers together with CSFs from selected patients. Threshold increases across the spatial frequency range were compared with predictions of a theoretical optical model based on modulation trans ...
... Purpose. Contrast sensitivity functions (CSFs) were measured under various optical conditions in healthy observers together with CSFs from selected patients. Threshold increases across the spatial frequency range were compared with predictions of a theoretical optical model based on modulation trans ...
CEREBRAL HERNIATION
... In uncal herniation, a common subtype of transtentorial herniation, the innermost part of the temporal lobe, the uncus, can be squeezed so much that it moves towards the tentorium and puts pressure on the brainstem, most notably the midbrain.The tentorium is a structure within the skull formed by th ...
... In uncal herniation, a common subtype of transtentorial herniation, the innermost part of the temporal lobe, the uncus, can be squeezed so much that it moves towards the tentorium and puts pressure on the brainstem, most notably the midbrain.The tentorium is a structure within the skull formed by th ...
Existing Pittsburgh Compound-B positron
... A variety of thresholds have been applied in the literature to define Pittsburgh compound-B positron emission tomography positivity, but the ability of these thresholds to detect early amyloid-b deposition is unknown, and validation studies comparing Pittsburgh compound-B thresholds to post-mortem am ...
... A variety of thresholds have been applied in the literature to define Pittsburgh compound-B positron emission tomography positivity, but the ability of these thresholds to detect early amyloid-b deposition is unknown, and validation studies comparing Pittsburgh compound-B thresholds to post-mortem am ...
NADPH-Diaphorase Activity Changes During Gangliogenesis and
... Whether this occurs by apoptotic or necrotic cell death related to NO release or by the translocation of these cells into other ganglia is unknown. In the abalone Haliotis rufescens, cerebral serotonergic neurons that innervate the velum are most likely lost by cell death (Barlow and Truman, 1992). ...
... Whether this occurs by apoptotic or necrotic cell death related to NO release or by the translocation of these cells into other ganglia is unknown. In the abalone Haliotis rufescens, cerebral serotonergic neurons that innervate the velum are most likely lost by cell death (Barlow and Truman, 1992). ...
JCN17 - Princeton University
... beliefs and bilateral parietal cortex for inferences lacking this feature (Goel & Dolan, 2003). With respect to (b), deduction has been variously described as primarily based on linguistic substrate (Goel et al., 1997; Goel et al., 1998; Goel & Dolan, 2004), entirely independent of it (Parsons & Osh ...
... beliefs and bilateral parietal cortex for inferences lacking this feature (Goel & Dolan, 2003). With respect to (b), deduction has been variously described as primarily based on linguistic substrate (Goel et al., 1997; Goel et al., 1998; Goel & Dolan, 2004), entirely independent of it (Parsons & Osh ...
The effects of normal aging on myelinated nerve fibers in monkey
... the fornix and the splenium of the corpus callosum (unpublished data), the loss is about 25%. In all four structures the correlations between the decreasing numbers of myelinated nerve fibers and increasing age are significant. In contrast, there is no measurable loss of myelinated nerve fibers from ...
... the fornix and the splenium of the corpus callosum (unpublished data), the loss is about 25%. In all four structures the correlations between the decreasing numbers of myelinated nerve fibers and increasing age are significant. In contrast, there is no measurable loss of myelinated nerve fibers from ...
MRI OF THE FETAL CNS Introduction Review
... Fetal safety Several studies have been performed and so far have failed to show any adverse short- or long-term side effects of 1.5T MR imaging on fetal and postnatal development (6-9). Although most fetal MR studies are performed on a 1.5T scanner, fetal MRI is also performed on 3T scanners, as the ...
... Fetal safety Several studies have been performed and so far have failed to show any adverse short- or long-term side effects of 1.5T MR imaging on fetal and postnatal development (6-9). Although most fetal MR studies are performed on a 1.5T scanner, fetal MRI is also performed on 3T scanners, as the ...
BAPM framework for fetal neonatal brain imaging_FINAL 010615 for
... neonatal encephalopathy (NE) or seizures should undergo MRI. 2. MRI is the modality of choice for diagnostic and prognostic imaging in NE and in neonatal seizures. For prognostic purposes, the optimal timing for image acquisition in cases of HIE is between 5 and 14 days after birth. 3. In infants wi ...
... neonatal encephalopathy (NE) or seizures should undergo MRI. 2. MRI is the modality of choice for diagnostic and prognostic imaging in NE and in neonatal seizures. For prognostic purposes, the optimal timing for image acquisition in cases of HIE is between 5 and 14 days after birth. 3. In infants wi ...
Ataxia - Diagnostic Centers of America
... mass lesions can also present with varying manifestations of gait and limb ataxia. Unless there is a contraindication, MRI, without and with contrast, is almost always superior to CT for the initial exclusion and characterization of a posterior fossa or other intracranial mass lesion. Lhermitte-Ducl ...
... mass lesions can also present with varying manifestations of gait and limb ataxia. Unless there is a contraindication, MRI, without and with contrast, is almost always superior to CT for the initial exclusion and characterization of a posterior fossa or other intracranial mass lesion. Lhermitte-Ducl ...
- Aston University
... pass-band) would pass only low spatial frequencies (i.e. those close to the origin) but would not care about their orientations. Such a filter is known as a low-pass isotropic filter and an example of how it transforms an image is shown in Figure 6a. (For now, you can ignore the small insets in the ...
... pass-band) would pass only low spatial frequencies (i.e. those close to the origin) but would not care about their orientations. Such a filter is known as a low-pass isotropic filter and an example of how it transforms an image is shown in Figure 6a. (For now, you can ignore the small insets in the ...
Network effects of deep brain stimulation
... accumbens (NAc) (Fig. 1). We have integrated reports from the functional magnetic resonance imaging (fMRI), positron emission tomography (PET), electroencephalography (EEG), electrocorticography (ECoG), and magnetoencephalography (MEG) literature. Each of these techniques offers different advantages ...
... accumbens (NAc) (Fig. 1). We have integrated reports from the functional magnetic resonance imaging (fMRI), positron emission tomography (PET), electroencephalography (EEG), electrocorticography (ECoG), and magnetoencephalography (MEG) literature. Each of these techniques offers different advantages ...
Neonatal Seizures
... 1.Volpe JJ.Neonatal seizures. In:Neurology of the newborn.4th ed.Philadelphia,Pa:WB Saunders's Co;2001:178-214 2.Hahn J,Olson D.Etiology of neonatal seizures.NeoReviews.2004;5:327-335 3.Riviello,J.Drug therapy for neonatal seizures:Part ...
... 1.Volpe JJ.Neonatal seizures. In:Neurology of the newborn.4th ed.Philadelphia,Pa:WB Saunders's Co;2001:178-214 2.Hahn J,Olson D.Etiology of neonatal seizures.NeoReviews.2004;5:327-335 3.Riviello,J.Drug therapy for neonatal seizures:Part ...
Neonatal Seizures
... 1.Volpe JJ.Neonatal seizures. In:Neurology of the newborn.4th ed.Philadelphia,Pa:WB Saunders's Co;2001:178-214 2.Hahn J,Olson D.Etiology of neonatal seizures.NeoReviews.2004;5:327-335 3.Riviello,J.Drug therapy for neonatal seizures:Part ...
... 1.Volpe JJ.Neonatal seizures. In:Neurology of the newborn.4th ed.Philadelphia,Pa:WB Saunders's Co;2001:178-214 2.Hahn J,Olson D.Etiology of neonatal seizures.NeoReviews.2004;5:327-335 3.Riviello,J.Drug therapy for neonatal seizures:Part ...
Morphometric Investigation of Neurons in the Hippocampal
... neuronal density in these regions would be the decreased neuronal cell volumes that would cause a more condensed alignment of neurons within these areas, therefore significantly lower nuclear diameter of healthy looking pyramidal neurons of CA1 area would contribute to this apparent increase of neur ...
... neuronal density in these regions would be the decreased neuronal cell volumes that would cause a more condensed alignment of neurons within these areas, therefore significantly lower nuclear diameter of healthy looking pyramidal neurons of CA1 area would contribute to this apparent increase of neur ...
Analysis of the Expression Pattern of Transmembrane
... is further emphasized by the fact that several eLRR-TM proteins have been linked to human neurological and psychiatric disorders including epilepsy, Tourette's syndrome, night blindness, congenital insensitivity to pain (with mental retardation) and Alzheimer's disease (Matsushima et al. 2005). Inde ...
... is further emphasized by the fact that several eLRR-TM proteins have been linked to human neurological and psychiatric disorders including epilepsy, Tourette's syndrome, night blindness, congenital insensitivity to pain (with mental retardation) and Alzheimer's disease (Matsushima et al. 2005). Inde ...
Regional specificity and practice: Dynamic changes in
... underlie neural plasticity related to practice, including changes to dentrite, synapse, and glial structure; and metabolic alterations (Kolb and Whishaw, 1998; Sanes and Donoghue, 2000). It is unknown, however, the extent to which these mechanisms may operate differently for brain regions that are m ...
... underlie neural plasticity related to practice, including changes to dentrite, synapse, and glial structure; and metabolic alterations (Kolb and Whishaw, 1998; Sanes and Donoghue, 2000). It is unknown, however, the extent to which these mechanisms may operate differently for brain regions that are m ...
Neonatal hypoglycemia and its effects on the
... Duvanel CB, Fawer C-L, Cotting J, et al. Long-term effects of neonatal hypoglycemia on brain growth and psychomotor development in small-for-gestational age preterm infants. J Petiatr 1999, 134;492-8. ...
... Duvanel CB, Fawer C-L, Cotting J, et al. Long-term effects of neonatal hypoglycemia on brain growth and psychomotor development in small-for-gestational age preterm infants. J Petiatr 1999, 134;492-8. ...
Intracortical mechanism of stimulus-timing
... In the visual system, because timing of visual stimuli can directly affect timing of neuronal spiking, it may play an important role in activity-dependent circuit modification. Recent studies have demonstrated several stimulus-timing-dependent cortical modifications that appear to be mediated by STD ...
... In the visual system, because timing of visual stimuli can directly affect timing of neuronal spiking, it may play an important role in activity-dependent circuit modification. Recent studies have demonstrated several stimulus-timing-dependent cortical modifications that appear to be mediated by STD ...
BLOCK TIME MONDAY TUESDAY WEDNESDAY THURSDAY
... 1. Current case discussions to be re‐deployed as three clinical localization cases 2. Students come to the session having already worked through the case, cases are discussed and then students are given an additional unknown to work‐on, closed book, followed by group discussion ...
... 1. Current case discussions to be re‐deployed as three clinical localization cases 2. Students come to the session having already worked through the case, cases are discussed and then students are given an additional unknown to work‐on, closed book, followed by group discussion ...
Long-term neural recording characteristics of wire microelectrode
... approximately perpendicular to and just above the cortical surface. The electrode ground is connected to a head screw and the signal reference wire is inserted between the dura and skull. The cranial opening is filled with sterile mineral ...
... approximately perpendicular to and just above the cortical surface. The electrode ground is connected to a head screw and the signal reference wire is inserted between the dura and skull. The cranial opening is filled with sterile mineral ...
facial pain and twitches
... reason, features such as skin turgor and capillary refill cannot be used to monitor the integrity of the venous and arterial anastomosis. Bedside Doppler can be used for the arterial pedicle, but gives no information on the venous pedicle. We do ultrasound on these grafts, the morning after the proc ...
... reason, features such as skin turgor and capillary refill cannot be used to monitor the integrity of the venous and arterial anastomosis. Bedside Doppler can be used for the arterial pedicle, but gives no information on the venous pedicle. We do ultrasound on these grafts, the morning after the proc ...
PDF
... ansatz is the central part of the analysis, and will be explained in a rather detailed fashion. To simplify the analysis, we assume in the following that stimuli can only be centred at the locations of the retinal channels. This leaves us with twice as many stimuli as cortical units. Two sensible fu ...
... ansatz is the central part of the analysis, and will be explained in a rather detailed fashion. To simplify the analysis, we assume in the following that stimuli can only be centred at the locations of the retinal channels. This leaves us with twice as many stimuli as cortical units. Two sensible fu ...
Transcranial Doppler
The Transcranial Doppler (TCD) and the more recent transcranial color Doppler (TCCD) are tests that measure the velocity of blood flow through the brain's blood vessels. The tests are used to help diagnosie emboli, stenosis, vasospasm from a subarachnoid hemorrhage (bleeding from a ruptured aneurysm), and other problems. These relatively quick and inexpensive test s are growing in popularity. The tests are effective for detecting sickle cell disease, ischemic cerebrovascular disease, subarachnoid hemorrhage, arteriovenous malformations, and cerebral circulatory arrest. The tests are possibly useful for perioperative monitoring and meningeal infection. The equipment used for these tests is becoming increasingly portable, making it possible for a clinician to travel to a hospital, to a doctor's office, or to a nursing home for both inpatient and outpatient studies. The tests are often used in conjunction with other tests such as MRI, MRA, carotid duplex ultrasound and CT scans. The tests are also used for research in cognitive neuroscience (see Functional transcranial Doppler, below).