Paediatrics: Hypotonia: Free MSRA Podcast

⚕️ FREE MSRA PODCAST – Hypotonia🎧 A clear, high-yield breakdown of this “floppy baby” presentation – perfect for exam prep and real-life clinical scenarios.🧠 Key Learning Points📌 Definition• Hypotonia describes decreased muscle tone, resulting in limpness or “floppiness” of the muscles. It’s a sign, not a diagnosis, indicating an underlying issue.📌 Causes & Risk Factors• Central nervous system (CNS) disorders: e.g., hypoxic ischaemic encephalopathy, cerebral palsy• Genetic syndromes: Down syndrome, Prader-Willi syndrome, spinal muscular atrophy• Neuromuscular disorders: muscular dystrophies, myasthenia gravis, Guillain-Barré syndrome• Metabolic disorders: hypothyroidism, Zellweger syndrome• Acute illnesses: severe infections (e.g. sepsis), metabolic derangements• Premature birth, family history of neuromuscular/genetic disordersMnemonic: “Central, Peripheral, Genetic, Metabolic, Acute” (CPGMA – Causes Prompt Great Medical Assessment!)📌 Pathophysiology• Disruption of the pathways controlling muscle tone (from brain, spinal cord, peripheral nerves, or muscle itself)• May be due to impaired nerve signals, muscle fibre abnormalities, or synaptic/junctional problems• Central (CNS) causes account for up to 66–88% of congenital hypotonia📌 Symptoms• Floppy, limp baby (“ragdoll” or “soft toy” feel)• Poor head control• Delayed motor milestones (sitting, crawling, walking)• Weakness, reduced reflexes, joint hypermobility• Poor posture, difficulty feeding or swallowing• High or low arches (pes cavus/flat feet), tiptoe walking, difficulties with heel walkingMnemonic: “FLACCID” – Floppy, Low strength, Absent reflexes (sometimes), Clumsy movements, Coordination poor, Infant Delays📌 Differential Diagnosis• Muscular dystrophies & myopathies• Cerebral palsy• Spinal muscular atrophy• Down syndrome• Prader-Willi syndrome• Metabolic disorders• Infantile botulism• Acute illnesses (sepsis, electrolyte abnormalities)📌 Diagnosis• Clinical assessment: history, physical exam (including motor milestones and tone/reflexes)• Bloods: CK, metabolic screen, thyroid function• Genetics: karyotyping, specific gene panels• Neuroimaging: MRI brain/spine• EMG & nerve conduction studies (usually normal in benign congenital hypotonia)• Muscle biopsy if neededMemory tip: “Clinical + CK + Chromosomes + CNS imaging”📌 Management• Treat underlying cause if identified (e.g. hypothyroidism, metabolic disorder)• Supportive therapy: physiotherapy (key), occupational and speech therapy• Early intervention for best outcomes• Assistive devices as needed (braces, walkers)• Multidisciplinary approach: regular monitoring and tailored care• No drug therapy for BCH (benign congenital hypotonia)📌 Complications• Motor developmental delays• Long-term mobility or coordination difficulties• Feeding or respiratory issues• Risk of contractures if not managed• Complications depend on underlying cause📌 Prognosis• Depends on cause; generally excellent for benign congenital hypotonia (BCH) with most cases resolving by puberty and normal intellectual development• Prognosis can be more guarded in genetic or progressive neuromuscular disorders📎 More MSRA Resources for Hypotonia📝 Revision Notes: https://www.passthemsra.com/topic/hypotonia-revision-notes/🧠 Flashcards: https://www.passthemsra.com/topic/hypotonia-flashcards/💬 Accordion Q&A Notes: https://www.passthemsra.com/topic/hypotonia-accordion-qa-notes/🚀 Rapid Quiz: https://www.passthemsra.com/topic/hypotonia-rapid-quiz/🎓 Full Course: https://www.passthemsra.com/courses/paediatrics-for-the-msra/#MSRA #MSRARevision #MSRATextbook #MSRAQuiz #MSRAQuestionBank #MSRAFlashcards #MSRAQandANotes #MSRAAccordions #MultiSpecialityRecruitmentAssessment #MSRAOnlineRevision #MSRARevisionWebsite #Hypotonia