Eye Anatomy and Physiology | Visual Pathway Physiology | Lesions and Defects скачать в хорошем качестве

Eye Anatomy and Physiology | Visual Pathway Physiology | Lesions and Defects

🩺 USMLE Aspirants & Medical Students: Master Visual Pathway Physiology & Lesions in 7 Minutes!. 👉 Related video: Eye Anatomy & Physiology Made Simple | Retinal Receptive Fields & Vision Physiology    • Eye Anatomy & Physiology Made Simple | Ret...   👁️🔬 This high-yield video simplifies visual pathway anatomy, neuro-ophthalmology, and lesion localization, with insights from Guyton and Hall’s Medical Physiology & Ganong’s Review of Medical Physiology. Ideal for USMLE Step 1, Step 2, clinical neurology, and ophthalmology rotations. 🔬 Visual Pathway Physiology: How Light Becomes Vision Learn how the visual system transforms light into neural signals for precise image processing in the brain. 📊 Key Structures & Their Functions 1️⃣ Retina 📸 – Rods & cones initiate phototransduction 2️⃣ Optic Nerve ⚡ – Transmits retinal signals to the brain 3️⃣ Optic Chiasm 🔄 – Nasal fibers cross; temporal fibers stay ipsilateral 4️⃣ Lateral Geniculate Nucleus (LGN) 🧠 – Thalamic relay for visual input 5️⃣ Optic Radiations 📊 – Superior fibers to upper cortex; Meyer's loop to lower bank 6️⃣ Primary Visual Cortex 🎯 – Final image processing in the occipital lobe 🔥 Visual Pathway Lesions & Clinical Correlations Optic Nerve Lesion 🚨 – Monocular vision loss or central scotoma (e.g., optic neuritis) Optic Chiasm Lesion 🔄 – Bitemporal hemianopia (e.g., pituitary tumor) Optic Tract Lesion ⚡ – Contralateral homonymous hemianopia (e.g., stroke) Temporal Lobe Lesion (Meyer's Loop) 🧠 – Contralateral superior quadrantanopia ("pie in the sky") Parietal Lobe Lesion 📊 – Contralateral inferior quadrantanopia ("pie on the floor") Occipital Cortex Lesion 🎯 – Homonymous hemianopia with macular sparing 🧬 Why It Matters Mastering visual pathway physiology and lesion patterns is critical for diagnosing neurological disorders, excelling in clinical ophthalmology, and scoring high on USMLE exams.