10. UMN Lesion vs LMN Lesion 🧠⚡ | Motor Nervous System Differences & Clinical Correlations

📌𝗝𝗼𝗶𝗻 𝗢𝘂𝗿 𝗧𝗲𝗹𝗲𝗴𝗿𝗮𝗺 𝗖𝗵𝗮𝗻𝗻𝗲𝗹 𝗛𝗲𝗿𝗲:- https://t.me/bhanuprakashdr 📌 𝐅𝐨𝐥𝐥𝐨𝐰 𝐨𝐧 𝐈𝐧𝐬𝐭𝐚𝐠𝐫𝐚𝐦:-   / drgbhanuprakash   📌𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗯𝗲 𝗧𝗼 𝗠𝘆 𝗠𝗮𝗶𝗹𝗶𝗻𝗴 𝗟𝗶𝘀𝘁:- https://linktr.ee/DrGBhanuprakash UMN Lesion vs LMN Lesion 🧠⚡ | Motor Nervous System Differences & Clinical Correlations Upper motor neuron (UMN) and lower motor neuron (LMN) lesions are among the most frequently tested and clinically important concepts in motor nervous system physiology, and this lecture explains their differences in a clear, exam-oriented manner 🧠📚. UMN lesions involve damage to motor pathways above the anterior horn cell, commonly affecting the corticospinal tract, and are characterized by spastic paralysis, increased muscle tone, exaggerated deep tendon reflexes, clonus, extensor plantar response (Babinski sign), and minimal muscle wasting ⚡. In contrast, LMN lesions result from damage to the anterior horn cell, nerve root, peripheral nerve, or neuromuscular junction, producing flaccid paralysis, decreased muscle tone, absent or reduced reflexes, marked muscle wasting, fasciculations, and a flexor plantar response 🔥. The lecture correlates these findings with underlying physiology such as loss of inhibitory control in UMN lesions and denervation effects in LMN lesions, helping students understand why tone and reflexes behave differently. Common clinical examples like stroke and spinal cord injury for UMN lesions, and poliomyelitis, peripheral neuropathy, and motor neuron disease for LMN lesions are discussed to reinforce lesion localization. By integrating pathway anatomy, physiological mechanisms, and bedside signs, this session builds strong conceptual clarity essential for MBBS theory exams, viva voce, MCQs, and neurological examination ❤️✨. #Physiology #Neurophysiology #MotorNervousSystem #UMNLesion #LMNLesion #CorticospinalTract #UpperMotorNeuron #LowerMotorNeuron #SpasticParalysis #FlaccidParalysis #BabinskiSign #Fasciculations #MuscleTone #Reflexes #LesionLocalization #ClinicalPhysiology #MBBS #MBBS1stYear #MedicalEducation #LectureSeries #UniversityExams #VivaVoce #HighYield #ConceptualMedicine #DrBhanuPrakash #DrGBhanuPrakash