Top Tweets for #anatomydecoded

10 months ago

Happy World Anatomy Day 2025 @AnatomyDecoded #anatomydecoded @drksravi @artanatomylab @GreysABC @WillHarrisAOAF @GreysAnatomyHD @AnatomyEats @fayedsouza

AnatomyDecoded's tweet photo. Happy World Anatomy Day 2025
@AnatomyDecoded
#anatomydecoded
@drksravi
@artanatomylab
@GreysABC @WillHarrisAOAF @GreysAnatomyHD @AnatomyEats @fayedsouza https://t.co/w8iq97I11f

232

Dr.Kartik Sonawane

@KartikBSonawane

about 1 year ago

🎯🧠Decoding Genicular Nerves: Anatomy, Nociception, & Their Role in Knee Pain After TKA🦿 #GenicularNerves #KneeAnatomy #PostTKAPain #NeuropathicPain #RegionalAnesthesia #PainMechanisms #TargetedBlocks #UltrasoundGuidedBlocks #AnatomyDecoded #ClinicalAnatomy #Neuroanatomy #PainAfterTKA #AnatomyMatters #TipOfTheDay #MyRATips Tip of the Day: 1. 🔍 What Does "Genicular" Mean? ♦The term “genicular” comes from the Latin "genu", meaning knee. ♦These nerves supply the area around the knee, particularly its capsular, ligamentous, & periarticular structures. ♦Also influences vascular control and pain transmission. ♦Approximately 14 genicular nerves (mixed sensory/motor/autonomic) from 5 major nerves (FN, OBN, SCN, TN, CPN). ♦They follow a predictable course, often accompanying genicular arteries. ♦Essential target in modern-day pain management strategies, such as genicular nerve blocks (GNB) and radiofrequency ablation (RFA). 2. ❓ Is the Infrapatellar Branch a Genicular Nerve? 🚫 No, the IPBSN is not classified as a genicular nerve. 🔹Primarily a cutaneous nerve, but may contribute to the inferomedial anterior capsule, alongside the IMGN. 🔹Not traveling with genicular arteries or through periosteum. 🔹Responsible for selective anterior knee pain syndromes. 🔹Usually not targeted in GNB/RFA unless for cutaneous neuroma or peripatellar pain 3. 🎯 Genicular vs Articular Branches ⚡Genicular Nerves: 📍 Location: Periarticular soft tissues (around bones, ligaments) 🎯 Function: Involved in pain transmission, proprioception, & autonomic vascular tone 🔥 Nociceptor Density: High density – major contributors to persistent pain 🧠 Clinical Targetability: Precisely located & often ultrasound-visible for blocks or RFA 🦵 Role Post-TKA: Remain active and relevant even after joint replacement 🧩 Articular Branches: 📍 Location: Confined to joint capsule & synovial lining 🎯 Function: Transmit pain only; minimal role in proprioception or autonomic function 🔥 Nociceptor Density: Variable – may be low in some areas 🧠 Clinical Targetability: Less consistently found; harder to visualize or block directly 🦵 Role Post-TKA: Often resected or disrupted during surgery, limiting their postoperative contribution 4. 🔄 Genicular Nerves Contribute to the Plexuses! 📍Think of genicular nerves as the named highways, and the plexuses as local neighborhood streets formed by their fine branches or communicating fibers. 📍Genicular nerves don’t just function independently - they feed into articular plexuses through tiny terminal branches 🔴 Peripatellar Plexus 🔹Formed by: saphenous, LFCN, SMGN, SLGN 🔹Supplies: skin, retinacula around the patella 🟡 Subsartorial Plexus 🔸Formed by: saphenous, NVM, PDOBN, SMGN 🔸Supplies: medial periosteum & anteromedial capsule 🔵 Popliteal Plexus ◾Formed by: MGN, IMGN, ILGN, tibial & sciatic articular branches ◾Supplies: posterior capsule,cruciate ligaments ➡ Thus, genicular nerves are not isolated but functionally interwoven into these plexuses via communicating fascicles - important for both superficial & deep pain transmission. 5. 🔬 Nociceptors in Genicular Nerves? Nociceptors are pain-sensing free nerve endings strategically located at, 🔴 Periarticular Soft Tissue 🔺Subsynovial tissue 🔺Joint capsule (especially anterior) 🔺Periosteum around femoral & tibial condyles 🔺Retinacula and meniscal horns 🟠 Infrapatellar Fat Pad (Hoffa's fat pad) ✦ Highly innervated and richly vascularized ✦ Nociceptors from the femoral & tibial nerves are abundant here ✦ One of the most pain-sensitive areas in the knee 🟡 Perivascular Plexus of Genicular Arteries ❃ Genicular nerves travel with genicular arteries, forming neurovascular bundles. ❃ These perivascular networks carry autonomic & nociceptive fibers ❃ The mechanical stretch, chemical irritation, or hypoxia here can generate significant pain 🔵 Intracapsular Ligaments (MGN) ✿ Enters joint via posterior capsule ✿ Supplies ACL, PCL, & synovial membrane ✿ Nociceptors are densely populated in cruciate ligament insertions 6. 🔧 Post-TKA Changes? 🔧 Anatomical & Functional Changes: 🔸Anterior capsule and fat pad often removed 🔸Periosteum traumatized or replaced by prosthesis 🔸Genicular nerve endings may be transected → neuroma formation 🧠 Resulting Pain Mechanisms: 🔥 Neuropathic pain from cut genicular nerves 🔁 Central sensitization 🧬 Residual nociception from posterior capsule, cruciate remnants, collateral ligaments 7.❓So, Do These Genicular Nerves Transmit Pain After TKA? ✅ Yes — but with altered roles. Despite the resection of anterior nociceptive zones, genicular nerves may still: 🔁 Transmit neuropathic signals from neuroma formation 📤 Relay inflammatory pain from residual structures 🧠 Participate in central sensitization & altered pain processing 8.🎯 Clinical Implication GNBs/RFA can still significantly reduce pain, especially in: 🔹 Post-TKA patients with persistent anterior knee pain 🔹 Patients with neuropathic elements or residual inflammation 🔹 Those with failed prosthetic integration or chronic pain syndromes 💡But, No Role in Immediate Post-TKA PAIN. 🏠✅Take-Home Messages 🔑 ⚡ Genicular nerves are periarticular sensory twigs involved in pain, proprioception, & vascular regulation. 🧠 14 genicular nerves arising from 5 major nerves, targeting anterior, posterior, and periosteal regions. 🔥 Nociceptors reside in the joint capsule, retinaculum, ligaments, and periosteum - not just the synovium. 🦿 Even after TKA, genicular nerves remain active contributors to residual or phantom knee pain. 🩻 Articular branches mainly serve pain-only functions and are often excised or disrupted during TKA. 🧩 Genicular nerves contribute to plexuses like peripatellar, subsartorial, and popliteal, explaining diffuse pain patterns. 💉DSB offers the broadest motor-sparing coverage - anterior, medial, posterior genicular innervation. 🎯 FTB covers anterior-medial capsule (SMGN, NVM, IPBSN) but misses deep/posterior contributors. 🚫 No single block covers all 14 genicular nerves - multimodal or dual-injection strategies are key. 🧭 Targeting genicular nerves via ultrasound or RFA is clinically precise and meaningful for chronic/post-TKA knee pain. But, Not for Acute Post-TKA pain. 📊 Distinction: ⚡ Genicular nerves = high nociceptive density, easy to target 🧩 Articular branches = limited pain role, inconsistent anatomy “Post-TKA pain isn’t always mechanical or inflammatory - it’s neuropathic, & geniculars are the source code.”

KartikBSonawane's tweet photo. 🎯🧠Decoding Genicular Nerves: Anatomy, Nociception, & Their Role in Knee Pain After TKA🦿

#GenicularNerves #KneeAnatomy #PostTKAPain
#NeuropathicPain #RegionalAnesthesia #PainMechanisms #TargetedBlocks #UltrasoundGuidedBlocks #AnatomyDecoded
#ClinicalAnatomy #Neuroanatomy #PainAfterTKA
#AnatomyMatters #TipOfTheDay #MyRATips

Tip of the Day:

1. 🔍 What Does "Genicular" Mean?

♦The term “genicular” comes from the Latin "genu", meaning knee.
♦These nerves supply the area around the knee, particularly its capsular, ligamentous, & periarticular structures.
♦Also influences vascular control and pain transmission.
♦Approximately 14 genicular nerves (mixed sensory/motor/autonomic) from 5 major nerves (FN, OBN, SCN, TN, CPN).
♦They follow a predictable course, often accompanying genicular arteries.
♦Essential target in modern-day pain management strategies, such as genicular nerve blocks (GNB) and radiofrequency ablation (RFA).

2. ❓ Is the Infrapatellar Branch a Genicular Nerve?

🚫 No, the IPBSN is not classified as a genicular nerve.
🔹Primarily a cutaneous nerve, but may contribute to the inferomedial anterior capsule, alongside the IMGN.
🔹Not traveling with genicular arteries or through periosteum.
🔹Responsible for selective anterior knee pain syndromes.
🔹Usually not targeted in GNB/RFA unless for cutaneous neuroma or peripatellar pain

3. 🎯 Genicular vs Articular Branches

⚡Genicular Nerves:
📍 Location: Periarticular soft tissues (around bones, ligaments)
🎯 Function: Involved in pain transmission, proprioception, & autonomic vascular tone
🔥 Nociceptor Density: High density – major contributors to persistent pain
🧠 Clinical Targetability: Precisely located & often ultrasound-visible for blocks or RFA
🦵 Role Post-TKA: Remain active and relevant even after joint replacement

🧩 Articular Branches:
📍 Location: Confined to joint capsule & synovial lining
🎯 Function: Transmit pain only; minimal role in proprioception or autonomic function
🔥 Nociceptor Density: Variable – may be low in some areas
🧠 Clinical Targetability: Less consistently found; harder to visualize or block directly
🦵 Role Post-TKA: Often resected or disrupted during surgery, limiting their postoperative contribution

4. 🔄 Genicular Nerves Contribute to the Plexuses!

📍Think of genicular nerves as the named highways, and the plexuses as local neighborhood streets formed by their fine branches or communicating fibers.
📍Genicular nerves don’t just function independently - they feed into articular plexuses through tiny terminal branches

🔴 Peripatellar Plexus
🔹Formed by: saphenous, LFCN, SMGN, SLGN
🔹Supplies: skin, retinacula around the patella

🟡 Subsartorial Plexus
🔸Formed by: saphenous, NVM, PDOBN, SMGN
🔸Supplies: medial periosteum & anteromedial capsule

🔵 Popliteal Plexus
◾Formed by: MGN, IMGN, ILGN, tibial & sciatic articular branches
◾Supplies: posterior capsule,cruciate ligaments

➡ Thus, genicular nerves are not isolated but functionally interwoven into these plexuses via communicating fascicles - important for both superficial & deep pain transmission.

5. 🔬 Nociceptors in Genicular Nerves?

Nociceptors are pain-sensing free nerve endings strategically located at,

🔴 Periarticular Soft Tissue
🔺Subsynovial tissue
🔺Joint capsule (especially anterior)
🔺Periosteum around femoral & tibial condyles
🔺Retinacula and meniscal horns

🟠 Infrapatellar Fat Pad (Hoffa's fat pad)
✦ Highly innervated and richly vascularized
✦ Nociceptors from the femoral & tibial nerves are abundant here
✦ One of the most pain-sensitive areas in the knee

🟡 Perivascular Plexus of Genicular Arteries
❃ Genicular nerves travel with genicular arteries, forming neurovascular bundles.
❃ These perivascular networks carry autonomic & nociceptive fibers
❃ The mechanical stretch, chemical irritation, or hypoxia here can generate significant pain

🔵 Intracapsular Ligaments (MGN)
✿ Enters joint via posterior capsule
✿ Supplies ACL, PCL, & synovial membrane
✿ Nociceptors are densely populated in cruciate ligament insertions

6. 🔧 Post-TKA Changes?

🔧 Anatomical & Functional Changes:
🔸Anterior capsule and fat pad often removed
🔸Periosteum traumatized or replaced by prosthesis
🔸Genicular nerve endings may be transected → neuroma formation

🧠 Resulting Pain Mechanisms:
🔥 Neuropathic pain from cut genicular nerves
🔁 Central sensitization
🧬 Residual nociception from posterior capsule, cruciate remnants, collateral ligaments

7.❓So, Do These Genicular Nerves Transmit Pain After TKA?

✅ Yes — but with altered roles.
Despite the resection of anterior nociceptive zones, genicular nerves may still:
🔁 Transmit neuropathic signals from neuroma formation
📤 Relay inflammatory pain from residual structures
🧠 Participate in central sensitization & altered pain processing

8.🎯 Clinical Implication
GNBs/RFA can still significantly reduce pain, especially in:
🔹 Post-TKA patients with persistent anterior knee pain
🔹 Patients with neuropathic elements or residual inflammation
🔹 Those with failed prosthetic integration or chronic pain syndromes

💡But, No Role in Immediate Post-TKA PAIN.

🏠✅Take-Home Messages 🔑

⚡ Genicular nerves are periarticular sensory twigs involved in pain, proprioception, & vascular regulation.
🧠 14 genicular nerves arising from 5 major nerves, targeting anterior, posterior, and periosteal regions.
🔥 Nociceptors reside in the joint capsule, retinaculum, ligaments, and periosteum - not just the synovium.
🦿 Even after TKA, genicular nerves remain active contributors to residual or phantom knee pain.
🩻 Articular branches mainly serve pain-only functions and are often excised or disrupted during TKA.
🧩 Genicular nerves contribute to plexuses like peripatellar, subsartorial, and popliteal, explaining diffuse pain patterns.
💉DSB offers the broadest motor-sparing coverage - anterior, medial, posterior genicular innervation.
🎯 FTB covers anterior-medial capsule (SMGN, NVM, IPBSN) but misses deep/posterior contributors.
🚫 No single block covers all 14 genicular nerves - multimodal or dual-injection strategies are key.
🧭 Targeting genicular nerves via ultrasound or RFA is clinically precise and meaningful for chronic/post-TKA knee pain. But, Not for Acute Post-TKA pain.
📊 Distinction:
⚡ Genicular nerves = high nociceptive density, easy to target
🧩 Articular branches = limited pain role, inconsistent anatomy

“Post-TKA pain isn’t always mechanical or inflammatory - it’s neuropathic, & geniculars are the source code.”

Dr.Kartik Sonawane

@KartikBSonawane

over 1 year ago

“Sciatic Nerve: The Great Pretender!” #SciaticNerve #TheGreatPretender #VlokaSheath #CoCuSeptum #RegionalAnesthesia #UltrasoundGuidedBlocks #AnatomyDecoded #MyRATips #TipOftheDay Tip of the Day: It looks like one big nerve—but it’s actually a dual-nerve bundle hidden in a sheath. ➡️ Two Nerves, One Sheath The “sciatic nerve” is a paraneural compartment (Vloka’s sheath) containing Tibial Nerve (TN) and Common Peroneal Nerve (CPN). ➡️ Split by Co–Cu Septum (Compton–Cruveilhier) Inside the sheath, TN & CPN are separated by the Co–Cu septum—a fascial divider that keeps them anatomically distinct, enabling selective nerve blocks. ➡️ No Common Epineurium The sciatic nerve has no unified epineurium—each component nerve retains its own protective layers, allowing for targeted or sparing techniques. ➡️ Innervation Above the Knee (No innervation by SCN) TN: semimembranosus, semitendinosus, long head of biceps femoris, ischial part of adductor magnus CPN: short head of biceps femoris. ➡️ Articular Supply to Hip & Knee Both TN & CPN give sensory branches to hip and knee joints, making sciatic blocks effective for posterior joint pain. ➡️ Regional Anesthesia Insight To block the sciatic nerve effectively, use subparaneural injection—inside Vloka’s sheath, but outside the nerves. It may look intraneural, but when done right, it’s safe and essential. Bottom Line: The sciatic nerve is a fascial illusion—two nerves, one sheath, divided by a septum. Understand the architecture. Respect the layers. Block with precision.

Top Tweets for #anatomydecoded

Last Seen Hashtags on Sotwe

Trends for you

Most Popular Users