Brandon King @brandonking on GrepMed

#blood supply of the brain

Principal features of Destructive and Irritative cortical lesions in right-handed individual #Cortical #Cortex #Lesions #Features #Signs #Symptoms #Brain #Neurology #Diagnosis

$Thoracolumbar spine fractures Satyendra Dhar MD, @DharSaty #thoracolumbar #spine #fracture #fracturemanagement #burstfracture #fractureclassification$

Thoracolumbar spine fractures Satyendra Dhar MD, @DharSaty #thoracolumbar #spine #fracture #fracturemanagement #burstfracture #fractureclassification

The middle cerebral artery territory is the most commonly affected territory in a cerebral infarction, due to the size of the territory and the direct flow from the internal carotid artery into the middle cerebral artery, providing the easiest path for thromboembolism. The neurological deficit will depend on the extent of the infarct and hemispheric dominance, and include: contralateral hemiparesis contralateral hemisensory loss hemianopia aphasia: if the dominant hemisphere is involved; may be expressive in anterior MCA territory infarction, receptive in posterior MCA stroke, or global with extensive infarction neglect: non-dominant hemisphere. Satyendra Dhar MD, @DharSaty #MCA # stroke #MCAterritory #brain #cva

ACA infarcts are rare because of the collateral circulation provided by the anterior communicating artery. ACA infarct can present as contralateral hemiparesis with loss of sensibility in the foot and lower extremity, sometimes with urinary incontinence. This is due to the involvement of the medial paracentral gyrus. If the lesion is very proximal, it is possible that there may be cognitive impairment due to lesions in the prefrontal cortex. Anterior cerebral artery strokes occur in the territory of the anterior cerebral artery which involves the superior and medial part of the parietal lobe along with the midline of the frontal lobe. These are uncommon causes of ischemic infarctions, making up about 0.3%-4.4% of stroke cases in series reports. The clinical presentation of this stoke is variable as it depends on whether the anterior cerebral artery or one of its branches is involved. Satyendra Dhar MD, @DharSaty #anteriorcerebralartery #cva #stroke #huebner #corpuscallosum #frontallobe #Apraxia #aphasia #abulia #disinhibition

Posterior cerebral artery (PCA) strokes can be challenging to diagnose, due to the variability in symptoms, which may be nonspecific and inconsistent upon initial presentation. The incidence of PCA strokes can be estimated between 5% to 10%. Patients may present in a comatose state via ambulance or may walk to an emergency department without assistance. Patients with a PCA stroke may present with only a headache and mild visual changes such as vision loss, diplopia, inability to see half of the view, or difficulty reading perceiving colors, or recognizing familiar faces. Satyendra Dhar MD, @DharSaty #PCAstroke #cva #stroke #antinsyndrome #hemianopia #alexia #agnosia #prosopagnosia #achromatopsia

Circle of Willis and brain circulation Herophilus of Chalcedon (335-280 BC), “Father of Anatomy,” described the vascular structure at the base of the brain which he named the rete mirabile (Latin for “wonderful net”). Although works of Herophilus were tragically destroyed on Julius Caesar’s invasion of Alexandria, some of his teaching can be found in the writings of Galen, who was said to have possessed all his work. Thomas Willis (1621–1675), a physician and Professor of Natural Philosophy at Oxford in the mid-17th century, demonstrated with great precision both the structure and the function of one major anastomotic arterial system. For this reason, the name of this structure is interchangeable, either as Willis’ circle or as Willis’ polygon, being one of the most famous eponymous structures in human anatomy. Satyendra Dhar MD, @DharSaty #circleofwillis #neuroanaromy #cva #baseofbrain #brain #stroke

Randomised comparison of needle aspiration and chest tube drainage in spontaneous pneumothorax Visual Abstract by Dr. Tom Fadial @thame Thelle et al, https://www.ncbi.nlm.nih.gov/pubmed/28404647 #Management #EBM #VisualAbstract #Spontaneous #Pneumothorax #NeedleAspiration #ChestTubeDrainage

Decompressive Craniectomy in Diffuse Traumatic Brain Injury (DECRA) In adults with severe diffuse traumatic brain injury and refractory intracranial hypertension, early bifrontotemporoparietal decompressive craniectomy decreased intracranial pressure and the length of stay in the ICU but was associated with more unfavorable outcomes. Source: N Engl J Med 2011; 364:1493-1502 https://www.nejm.org/doi/full/10.1056/NEJMoa1102077 - Dr. Steve Mathieu - https://twitter.com/stevemathieu75 #DECRA #Craniectomy #Decompressive #TBI #VisualAbstract #EBM #DecisionAid #Neurosurgery #Craniotomy