#171 High-convexity tight sulci

09/17/20 • 10 min

You know the triad for normal pressure hydrocephalus (NPH). Wet, wobbly, and wacky. And you have probably heard of the Evan’s index—the relative proportion of the lateral ventricles in reference to the inner table of the skull. But you might not have heard of high-convexity tight sulci.

Now you have.

Produced by James E. Siegler. Music courtesy of Jason Shaw, Javolenus, and Lee Rosevere, under a Creative Commons License. The opening theme was composed by Jimothy Dalton. Sound effects by Mike Koenig and Daniel Simion. BrainWaves' podcasts and online content are intended for medical education only and should not be used for clinical decision making. Be sure to follow us on Twitter @brainwavesaudio for the latest updates to the podcast.

REFERENCES

Kitagaki H, Mori E, Ishii K, Yamaji S, Hirono N and Imamura T. CSF spaces in idiopathic normal pressure hydrocephalus: morphology and volumetry. AJNR American journal of neuroradiology. 1998;19:1277-84.
Sasaki M, Honda S, Yuasa T, Iwamura A, Shibata E and Ohba H. Narrow CSF space at high convexity and high midline areas in idiopathic normal pressure hydrocephalus detected by axial and coronal MRI. Neuroradiology. 2008;50:117-22.
Allali G, Laidet M, Armand S, Momjian S, Marques B, Saj A and Assal F. A combined cognitive and gait quantification to identify normal pressure hydrocephalus from its mimics: The Geneva's protocol. Clinical neurology and neurosurgery. 2017;160:5-11.
Graff-Radford J, Gunter JL, Jones DT, Przybelski SA, Schwarz CG, Huston J, 3rd, Lowe V, Elder BD, Machulda MM, Gunter NB, Petersen RC, Kantarci K, Vemuri P, Mielke MM, Knopman DS, Graff-Radford NR and Jack CR, Jr. Cerebrospinal fluid dynamics disorders: Relationship to Alzheimer biomarkers and cognition. Neurology. 2019;93:e2237-e2246.

Now you have.

REFERENCES

Kitagaki H, Mori E, Ishii K, Yamaji S, Hirono N and Imamura T. CSF spaces in idiopathic normal pressure hydrocephalus: morphology and volumetry. AJNR American journal of neuroradiology. 1998;19:1277-84.
Sasaki M, Honda S, Yuasa T, Iwamura A, Shibata E and Ohba H. Narrow CSF space at high convexity and high midline areas in idiopathic normal pressure hydrocephalus detected by axial and coronal MRI. Neuroradiology. 2008;50:117-22.
Allali G, Laidet M, Armand S, Momjian S, Marques B, Saj A and Assal F. A combined cognitive and gait quantification to identify normal pressure hydrocephalus from its mimics: The Geneva's protocol. Clinical neurology and neurosurgery. 2017;160:5-11.
Graff-Radford J, Gunter JL, Jones DT, Przybelski SA, Schwarz CG, Huston J, 3rd, Lowe V, Elder BD, Machulda MM, Gunter NB, Petersen RC, Kantarci K, Vemuri P, Mielke MM, Knopman DS, Graff-Radford NR and Jack CR, Jr. Cerebrospinal fluid dynamics disorders: Relationship to Alzheimer biomarkers and cognition. Neurology. 2019;93:e2237-e2246.

Previous Episode

#170 Myoclonus and neurodegenerative diseases

Myoclonus is the most etiologically non-specific motor manifestation of neurologic and systemic disease. It’s like slurred speech or altered mental status. But in the appropriate context, it can become a useful clue in your differential diagnosis. Dr. John Caviness of the Mayo Clinic joins Jim Siegler this week for a discussion on this abnormal movement and what it may indicate.

Produced by James E. Siegler and John Caviness. Music courtesy of Kevin McLeod and E’s Jammy Jams. “Endings” and “What’s the Angle” were produced by Shane Ivers (https://www.silvermansound.com). The opening theme was composed by Jimothy Dalton. Sound effects by Mike Koenig and Daniel Simion. Unless otherwise mentioned in the podcast, no competing financial interests exist in the content of this episode. BrainWaves' podcasts and online content are intended for medical education only and should not be used for clinical decision making. Be sure to follow us on Twitter @brainwavesaudio for the latest updates to the podcast.

REFERENCES

Caviness JN. Myoclonus and neurodegenerative disease--what's in a name? Parkinsonism Relat Disord. 2003;9:185-92.
Caviness JN. Parkinsonism & related disorders. Myoclonus. Parkinsonism Relat Disord. 2007;13 Suppl 3:S375-84.
Caviness JN. Pathophysiology and treatment of myoclonus. Neurol Clin. 2009;27:757-77, vii.
Zutt R, van Egmond ME, Elting JW, van Laar PJ, Brouwer OF, Sival DA, Kremer HP, de Koning TJ and Tijssen MA. A novel diagnostic approach to patients with myoclonus. Nature reviews Neurology. 2015;11:687-97.
Levy A and Chen R. Myoclonus: Pathophysiology and Treatment Options. Current treatment options in neurology. 2016;18:21.
Caviness JN. Myoclonus. Continuum (Minneap Minn). 2019;25:1055-1080.

Next Episode

#172 Cavernoma

As the second most common vascular malformation in the central nervous system, cerebral cavernomas are often incidental radiographic findings. Also incidental is Jim’s interest in mediocre sci-fi television shows, such as Netflix’s recent series, Away—which incidentally includes one character with a symptomatic cerebral cavernoma. This week on the podcast, Dr. Siegler discusses with Dr. Dena Little (Cooper University Hospital) the epidemiology, clinical course, and management (including counseling) of patients with this vascular malformation.

Plus, a critical appraisal of Away’s medical consultant. 0_o

Produced by James E. Siegler and Dena Little. Music courtesy of Ars Sonor, Andrew Sacco, Chris Zabriskie, and Purple Planet Music. The opening theme was composed by Jimothy Dalton. Sound effects by Mike Koenig and Daniel Simion. Unless otherwise mentioned in the podcast, no competing financial interests exist in the content of this episode. BrainWaves' podcasts and online content are intended for medical education only and should not be used for clinical decision making. Be sure to follow us on Twitter @brainwavesaudio for the latest updates to the podcast.

REFERENCES

Pozzati E, Acciarri N, Tognetti F, Marliani F and Giangaspero F. Growth, subsequent bleeding, and de novo appearance of cerebral cavernous angiomas. Neurosurgery. 1996;38:662-9; discussion 669-70.
Batra S, Lin D, Recinos PF, Zhang J and Rigamonti D. Cavernous malformations: natural history, diagnosis and treatment. Nature reviews Neurology. 2009;5:659-70.
Gross BA, Lin N, Du R and Day AL. The natural history of intracranial cavernous malformations. Neurosurgical focus. 2011;30:E24.
Horne MA, Flemming KD, Su IC, Stapf C, Jeon JP, Li D, Maxwell SS, White P, Christianson TJ, Agid R, Cho WS, Oh CW, Wu Z, Zhang JT, Kim JE, Ter Brugge K, Willinsky R, Brown RD, Jr., Murray GD, Al-Shahi Salman R and Cerebral Cavernous Malformations Individual Patient Data Meta-analysis C. Clinical course of untreated cerebral cavernous malformations: a meta-analysis of individual patient data. The Lancet Neurology. 2016;15:166-173.
Zafar A, Quadri SA, Farooqui M, Ikram A, Robinson M, Hart BL, Mabray MC, Vigil C, Tang AT, Kahn ML, Yonas H, Lawton MT, Kim H and Morrison L. Familial Cerebral Cavernous Malformations. Stroke; a journal of cerebral circulation. 2019;50:1294-1301.
Zuurbier SM, Hickman CR, Tolias CS, Rinkel LA, Leyrer R, Flemming KD, Bervini D, Lanzino G, Wityk RJ, Schneble HM, Sure U, Al-Shahi Salman R and Scottish Audit of Intracranial Vascular Malformations Steering C. Long-term antithrombotic therapy and risk of intracranial haemorrhage from cerebral cavernous malformations: a population-based cohort study, systematic review, and meta-analysis. The Lancet Neurology. 2019;18:935-941.