– Anatomy: – Tunnel V: – overlies distal ends of radioulnar articulation on dorsum of wrist, contains EDM; – Tunnel VI: – in groove between the apex of ulnar styloid process & ulnar head, contains ECU tendon which is palpable from … Read more
– Discussion: – most frequent radiocarpal instability; – the lunate is translocated ulnarly, and therefore is not supported by the radius; – ulnar translationn is also commonly seen in disease such as RA or in Madelung’s deformity; – in RA, may occur along … Read more
– Discussion: – mean ulnar variance is 0.9 mm (range: 4.2 to 2.3 mm); – functional anatomy: – w/ neutral variance, 80% of load is born by radius and 20% by ulna; – 2.5 mm increase in ulnar varience will increase … Read more
– See: – Vascular Problems of the Wrist and Hand: – Discussion: – traumatic thrombosis of superficial palmar arch of ulnar artery resulting from repetitive use of hand as hammer; – in this maneuver, maximum force of the blow occurs over hook hamate bone, stie of … Read more
– Anatomy: – ulnar bursae includes little finger tendon sheath which begins at terminal phalanx & extends proximally half way up the palm; – occassionally the distal unexpanded part of little finger tendon sheath does not communicate w/ ulnar bursae; – in the palm, the ulnar … Read more
– See: – MP joint deformities – Distal Ulna Arthroplasty – Rheumatoid Hand – Anatomical Contributing Factors: (to ulnar drift) – normal mechanical advantage of the ulnar intrinsic muscles – asymmetry & ulnar slope of MC heads of index & middle fingers; – asymmetry of the collateral … Read more
– night stick fracture: mechanism: direct trauma w/ forearm used to block blow – stable frx: – diplaced < 50% = Stable; – periosteum & interosseous membrane are intact & act as restraint to rotation; – unstable fracture: … Read more
– See – Cubitbal Tunnel Syndrome – Differential Dx: Ulnar Nerve Dysfunction: – Martin Gruber Anastomosis – Ulnar Nerve Blocks: – Ulnar Nerve in Condylar Fractures: – Anatomy: – brachial plexus: – C8 and T1 nerve roots give rise to the medial cord which in turn, forms the ulnar nerve; – ulnar nerve passes distally, … Read more
– Discussion: – ulnar nerve blocks are used for frxs of little finger ray & in along w/ median and radial sensory blocks for ring finger ray fractures; – Anatomy: – ulnar nerve has two sensory branches that provide sensory innervation to ulnar side of the hand; – palmar … Read more
div class=”mh-row clearfix”> h1>/h1> div class=”bodycopy”>hr size=”3″/> br/> a href=”/image4/ulna1.jpg”>img src=”/image4/ulna1a.jpg” alt=””/>/a> a href=”/image4/ulna2.jpg”>img src=”/image4/ulna2a.jpg” alt=””/>/a> a href=”/image4/ulna3.jpg”>img src=”/image4/ulna3a.jpg” alt=””/>/a>br/> br/> – See:br/> – a href=”/bones/radius-ulna/adult-both-bone-forearm-frx/”>Both Bone Forearm Fracture:/a> / a href=”/orthopaedics/ulnar-styloid-process-frx/”>Ulnar Styloid/a> Processbr/> br/> strong>- Anatomy:/strong>br/> – radius & ulna lie parallel to each other when forearm is supinated;br/> … Read more