💥 What is your diagnosis ❓
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Nystagmus is an involuntary, repetitive movement of the eyes.
It’s usually a sign of a neurological issue.
❓ Common Causes:
1️⃣ Listeriosis: Caused by spoiled feed. Symptoms include circling, head tilt & depression..
Thiamine Deficiency (PEM): Leads to blindness, ataxia, and seizures.
3️⃣ Infections: Ear or brain infections affecting balance.
4️⃣ Trauma: Head injuries.
5️⃣ Toxins: Poisonous plants or chemicals.
6️⃣ Parasitic Issues: E.g., meningeal worm
💥 PALPEBRAL REFLEX EXAMINATION IN DOGS 🐕
📌Nerves Involved:
1. Facial Nerve (CN VII)
- Motor branch: controls orbicularis oculi muscle (eyelid closure)
- Sensory branch: palpebral nerve (afferent pathway)
2. Trigeminal Nerve (CN V)
- Ophthalmic branch (V1): sensory input from eyelid
📌Examination Technique:
1. Gently touch medial canthus (angle between eyelids)
2. Observe eyelid closure
📃 Normal Response:
1. Immediate, complete eyelid closure
📃 Abnormal Response:
1. Delayed or incomplete closure
2. Absent reflex (indicating facial nerve damage)
📌Anatomical Landmarks:
1. Medial canthus
2. Lateral canthus (outer corner)
3. Palpebral fissure (eyelid opening)
📌Clinical Significance:
1. Evaluates facial nerve function
2. Assesses trigeminal nerve sensory input
3. Detects eyelid or orbital diseases
©️Video Credit: DrCatthyMorris
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- If a new born calf requires resuscitation, it is recommend to put them in "Calf Recovery Position" poke a clean straw in their nose, dribble few water drops in ear, rub vigorously & don't hang the calf upside down.
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Regards: Half Baked Veterinarian
📃Nystagmus is an abnormal position of eyeball & eyelid, involuntary movement of eye from side to side, up & down and in circle.
NYSTAGMUS is the principal sign of polioencephalomalacia & listeriosis.
©️Credit: Dr. Waseem Khan (LinkedIn)