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The EEG pattern shown below is most consistent with which of the following?
The MR angiogram shown below demonstrates which of the following?
A 7-year-old boy with a history of right facial port-wine stain and mild developmental delay presents to the emergency room for seizures. An MRI brain is performed and the T1 with contrast sequence is shown below. What is the most likely diagnosis?
In normal neonatal development, which of the following structures myelinates the latest?
Which of the following medications is effective in the treatment of myotonia?
A 35-year-old male presents to the neurology clinic for the management of seizures. The patient reports having focal to bilateral tonic-clonic seizures (FTBTC) since the age of 15. His seizures are usually preceded by the smell of burning rubber. He will then have left hand automatisms followed by whole-body tonic-clonic activity. Levetiracetam monotherapy was initially effective. However, 1 year ago seizures returned, occurring once every two months. Lacosamide was added 6 months ago but there has been no significant improvement in his seizure frequency. Levels of these two anti-seizure medications (ASMs) are therapeutic and there have been no concerns regarding medication adherence. What is the most appropriate next step in management?
Which of the following conditions is most likely to have an associated disorder of abnormal motor activity during the following sleep state?
An 8-year-old girl presents with a progressive neurologic disorder. She initially was noted to have slow learning and clumsiness years ago. Shortly thereafter she developed a seizure disorder of unclear etiology. Now, she has been having progressive visual changes and worsened cognition and memory. To aid in the diagnosis, a muscle biopsy is done and shows autofluorescent curvilinear bodies. Her disorder falls into which category of disease?
What is the typical brainstem auditory evoked response (BAER) finding with cortical hearing loss?
Axial T2 (left) and T1 (right) brain MRI images of a 3-month-old with a history of seizures and developmental delay are displayed below. Which of the following is the most likely cause for the pathology shown?
A 75-year-old man with a past medical history of hypertension, hyperlipidemia, and diabetes presents with acute onset right arm weakness and speech problems. He can speak fluently and his comprehension is intact. However, he is unable to repeat even simple sentences. Reading and writing are preserved. Which of the following is an accurate description of his speech dysfunction?
This brain biopsy is representative of which of the following tumors?
A 42-week gestational age female was born vaginally to a mother with a history of type 2 diabetes. Delivery was complicated by shoulder dystocia and required assistance with forceps. Apgar scores at 1 and 5 minutes were seven and nine, respectively. Her birth weight was 9 pounds and 6 ounces. Examination after birth showed there was no appreciable left arm bicep or deltoid function. What is the most likely etiology for this finding?
A 57-year-old navy veteran with a history of PTSD presents with a 2-year history of progressive, asymmetric weakness. The patient states that symptoms started in his left arm. Six months later he started to have falls due to tripping over his right foot. His neurological examination shows weakness of the intrinsic hand muscles of the left arm, ⅖ strength on dorsiflexion of the right ankle, and no sensory disturbances. Reflexes were mute in the left upper extremity and there were several beats of clonus at the right ankle. Fasciculations were present in the tongue, right gastrocnemius, and left tibialis anterior. An EMG is recommended for diagnosis. Which of the following EMG findings are most likely seen in this patient?
Motor unit action potential (MUAP) conduction velocities of a newborn are what percentage of an adult?