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Cranial Nerves: Types Part I01:14

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Cranial nerves are responsible for transmitting motor and sensory information between the brain and various parts of the body. There are twelve pairs of cranial nerves, with the first six being essential in sensory perception, motor control, and autonomic functions related to the head and neck.
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Related Experiment Video

Updated: Sep 11, 2025

Transient Middle Cerebral Artery Occlusion Model of Neonatal Stroke in P10 Rats
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A Subtle Sighting: Acute Midbrain Infarction Presenting as Isolated Medial Rectus Palsy.

Salomon Chamay1, Ermias Greffie1, Francisco J Gallegos Koyner2

  • 1Internal Medicine, SBH Health System, New York City, USA.

Cureus
|August 19, 2025
PubMed
Summary
This summary is machine-generated.

Isolated ocular motor palsy, a rare stroke symptom, can cause double vision. This case highlights a midbrain infarction leading to isolated medial rectus palsy, emphasizing the need for thorough neurological exams.

Keywords:
binocular diplopiaisolated oculomotor palsymidbrain infarctionoculomotor nerve (cn iii) palsystroke

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Area of Science:

  • Neuroscience
  • Ophthalmology
  • Neurology

Background:

  • Isolated ocular motor palsy is uncommon in cerebrovascular accidents, often mistaken for trauma or muscle issues.
  • Diplopia is a frequent symptom, necessitating differentiation between monocular and binocular causes.

Observation:

  • A 64-year-old male presented with isolated left medial rectus palsy.
  • The patient reported diplopia as the sole symptom.

Findings:

  • The palsy was diagnosed as secondary to an acute midbrain infarction.
  • No other acute stroke manifestations were present.

Implications:

  • This case underscores the importance of considering cerebrovascular accidents in isolated ocular motor palsies.
  • Detailed neurological examination is crucial for accurate diagnosis and timely intervention.