Understanding of the Boutonniere and Swan neck deformity requires clear concept of the finger extensor apparatus, which has been discussed here. The extrinsic extensor tendons trifurcate giving a central slip which attaches to the middle phalanx base and two lateral slips which join with lateral band (formed by intrinsic muscles…
Tag: Musculoskeletal system
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Spaces and Compartments of Hand
Spaces of Hand Deep space infections occur in one of the three anatomically defined potential spaces within the hand. Thenar, mid-palmar and hypothenar spaces Interdigital subfascial web space Forearm space of parona Deep hand space Dorsal border Volar border Ulnar border Radial border Remarks Thenar Adductor pollicis Palmar aponeurosis Middle…
Clinical Skills and Approaches 
Approach to Thoracic and Lumbar Spine X-ray
Views Standard: Supine AP and Latero-lateral (LL) views – thoracic or lumbar Thoracic: Lateral (Fulcrum) bending views: to determine the flexibility of curves in scoliosis Lumbar: De Seze view (Lumbopelvic view): Standing AP and LL – shows T11 to head of femur Dynamic lateral (flexion-extension) views: for instability Oblique views…
Clinical Skills and Approaches 
Thoracolumbar Metastases Management : Mnemonic Approach
The primary malignancies that commonly metastasize to the spine can be recalled using the mnemonic: PB KTL (or “Lead Kettle”. Prostate Breast Kidney Thyroid Lungs In women, 80% metastases are from lung and breast and in men, 80% are from lung and prostate. LMNOP approach A. Location/Level 80% involve well-vascularized…
PGMEE, MRCS, USMLE, MBBS, MD/MS 
THA dislocation : WHAT mnemonic
The incidence of THA dislocation is: Primary THA: 1-2% Revision THA: 5-7% Mnemonic: WHAT caused the total hip arthroplasty dislocation? Wear Types: Volumetric wear: proportional to r2 (diameter of head) Linear wear (related to penetration of femoral head into liner): smaller heads have higher linear wear Adhesive wear (most important):…
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Scaphoid Fractures : Rule of 70s
70% of blood supply of scaphoid is by dorsal branch of radial artery 70% of scaphoid bones have arterial foramina through out their length 70% of carpal fractures are scaphoid fractures 70% of scaphoid fractures occur through the waist 70% of scaphoid fractures are detected on initial radiographs 70% proximal…
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Pes Anserinus : Mnemonic
Pes Anserinus is composed of the combination of tendinous insertions of the sartorius, gracilis and semitendinosus muscles (guy ropes muscles) which attaches to the medial side of tibia to generate a “goose’s foot” like appearance. These three muscles are mainly flexors of the knee but also have a role in…
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Diagnosis of Spinal Instability (White & Panjabi) : Mnemonic
Mnemonic: Remember 4 D common to all + 3 D for C-spine and 1 D for L-spine Diagnosis requires: Score >4 Denis column disruption: Anterior column destroyed or unable to function (2 points) Posterior column destroyed or unable to function (2 points) Deformity: Will have a maximum score of 4…