Related Experiment Video
Updated: Jul 5, 2026
08:10
Reproducible Motor Deficit Following Aortic Occlusion in a Rat Model Of Spinal Cord Ischemia
Published on: July 22, 2017
Acquired ocular motor apraxia after aortic surgery
Robert Donald Yee1, Valerie Ann Purvin
1Department of Ophthalmology, Indiana University School of Medicine, Indianapolis, USA.
Transactions of the American Ophthalmological Society
|April 23, 2008
Summary
This study describes acquired ocular motor apraxia, a rare condition causing impaired eye movements after aortic surgery. The findings suggest potential brainstem or frontal lobe pathway damage.
Area of Science:
- Neuroscience
- Ophthalmology
- Cardiovascular Surgery
Background:
- Acquired ocular motor apraxia is a rare neurological disorder affecting voluntary eye movements.
- Aortic root and arch surgeries are complex procedures with potential neurological complications.
Observation:
- Three patients developed ophthalmoplegia following aortic surgery.
- Neuro-ophthalmic examination revealed absent or impaired volitional and reflex saccades.
- Smooth pursuit and vestibulo-ocular response (VOR) remained intact in most patients.
Findings:
- Patients exhibited profound deficits in horizontal and vertical saccades.
- Magnetic resonance imaging (MRI) showed lesions in the brainstem or cerebrum in one patient.
- The syndrome appears distinct, with pathophysiology potentially linked to brainstem or frontal eye field pathways.
Implications:
- This case series highlights a unique syndrome of acquired ocular motor apraxia post-aortic surgery.
- Understanding the neural pathways of saccade generation is crucial for diagnosing and managing such cases.
- Further research is needed to elucidate the exact pathophysiology and optimize patient outcomes.
Related Concept Videos
01:22Aneurysm IV: Nursing Management
Vigilant monitoring for aneurysm rupture is essential for patients undergoing aortic surgery.Preoperative Nursing ManagementContinuously monitor the patient for manifestations of aneurysm rupture, such as pallor, weakness, tachycardia, hypotension, abdominal, back, groin, or periumbilical pain, changes in consciousness, and a pulsating abdominal mass. Regularly assess the patient's peripheral pulses.Instruct the patient to consume a clear liquid diet the day before surgery and administer...
01:23Peripheral Artery Disease V: Postoperative Nursing Management
During the postoperative period, it is crucial to focus on maintaining circulation, identifying and managing potential complications, and planning for discharge.Nursing AssessmentVital signs monitoring: Regularly monitor vital signs, including blood pressure, heart rate, respiratory rate, and temperature, to detect early signs of complications such as bleeding and infection.Circulation assessment: Monitor pulses, perform Doppler assessments, and check capillary refill, color, temperature, and...
01:26Aneurysm III: Interprofessional Care
Aneurysm management involves either conservative medical therapy or surgical intervention, depending on the size and symptoms of the aneurysm. Conservative management is generally reserved for smaller, asymptomatic aneurysms, while larger or symptomatic aneurysms often necessitate surgical repair.Conservative Medical TherapyFor small, asymptomatic aneurysms, particularly abdominal aortic aneurysms (AAA) less than 5.5 centimeters in diameter, conservative medical therapy is recommended. This...
01:10The Arch of Aorta
The coronary arteries, originating from the ascending aorta, bifurcate from two sinuses located within the ascending aorta. Positioned just above the aortic semilunar valve, these sinuses house essential aortic baroreceptors and chemoreceptors, crucial for maintaining cardiac function. The left coronary artery and the right coronary artery branch off from the left posterior and anterior aortic sinuses, respectively.
Encircling the heart, the coronary arteries form a ring-like structure before...
Encircling the heart, the coronary arteries form a ring-like structure before...
01:25Aortic Regurgitation III: Medical Management
Aortic regurgitation (AR) is when the aortic valve does not close or seal properly, leading to backward blood circulation from the aorta into the left ventricle during diastole. Common causes of AR include rheumatic heart disease, congenital valve defects, and aortic root dilation. Managing AR requires a multifaceted approach to alleviate symptoms, preserve left ventricular function, and address the underlying cause of the regurgitation. Patients with symptomatic AR or significant left...