Muscle Origin Insertion Action Innervation Anterior compartment 1. Tibialis anterior (TA) Superior 2/3 lateral surface of tibia Medial cuneiform, 1st metatarsal Dorsiflexion, foot inversion Deep peroneal nerve (L5) 2. Extensor digitorum longus (EDL) Superior 2/3 of fibula and interosseous membrane Middle and distal phalanx, lateral 4 toes Dorsiflexion, toe extension…
Category: PGMEE, MRCS, USMLE, MBBS, MD/MS
Medical knowledge in bullet points with understandable language, simplified images and graspable mnemonics.
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Arthrodesis Positions
Arthrodesis is the surgical fusion of a diseased joint for the purposes of obtaining pain relief and stability. The bones are fused in a position permitting most useful function but lose their natural motion. Shoulder Flexion: 30° Abduction: 20° Internal rotation: 40° Elbow One side: 90° Both side: One in…
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Paget’s Disease of bone : Mnemonic
Synonyms: Osteitis deformans Collage of matrix madness Mnemonic: Sixteen “P”s 1. Paramyxovirus infection and inclusions in osteocalsts 2. Pain (most common symptom – localized fractures or nerve compressions) 3. Pelvis (most common site) 4. Polyostotic (more common; 85%) 5. Phases: Active (lytic, mixed, sclerotic) and Inactive 6. Plasma volume expansion…
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Osteopetrosis : Mnemonic
Synonyms: Marble bone disease Albers-Schonberg disease (Autosomal dominant form) Mnemonic: OSTEOPETROSIS Osteoclast dysfunction (Carbonic anhydrase II gene mutation or chloride channel dysfunction) Symmetric skeletal sclerosis Thickened cortex with loss of medullary canal diameter (bone in bone appearance) Extramedullary hematopoiesis (aplastic anemia and hepatosplenomegaly) Overgrowth of skull foramina (cranial nerve palsies)…
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Rickets Made Easy
Types Type Pathology 25(OH) D 1,25(OH)2 D PTH Ca PO4 ALP Additional clinical findings Treatment Vitamin D deficiency (Nutritional) Hypovitaminosis D 🡢 Hypocalcemia 🡢 Secondary hyperparathyroidism 🡢 Rise of serum calcium towards normal level ↓ ↓ ↑ ↓/= ↓ ↑ Rachitic rosaryBowing of kneesMuscle hypotoniaWaddling gaitDental diseaseLooser zones/Milkman’s fracture (pseudofracture…
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Calcium Metabolism
Functions Mnemonic: Six ‘C’s Contraction of muscles (Coupling of excitation-contraction) Conduction in nerves Cardiac function Coagulation in blood (Co-factor) Communication (intracellular messengers) for hormones, autacoids and transmitters Cementing (mineralization) of bone – Compressive strength Distribution Average young adult = 1200 gm calcium 99% in bone as calcium hydroxyapatite 1% in…
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Hawkin’s Classification for Talus Fractures : Mnemonic
Mnemonic: NISA 10-50-90-100 Type I – Non-displaced Neck fracture (upto 10% risk of AVN) 1 blood vessel damaged (entering talar neck) Management: 8 weeks in cast and 4 weeks in CAM cast Type II – Type I + Inferior (subtalar) subluxation/dislocation (upto 50% risk of AVN) 2 blood vessels damaged…
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Swan neck deformity vs Boutonniere deformity
Alterations in the relationships between the balanced extrinsic and intrinsic musculature of the hand due to trauma or secondary to the effects of systemic disease may cause the development of functional deformities such as a boutonnière or swan-neck deformity. Swan-neck deformity Boutonniere deformity Deformity PIPJ Hyperextension PIPJ Flexion DIPJ Flexion…