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Laboratory 9. Extensor Region of Forearm and Dorsum of Hand
Step 2. Anatomical "Snuff Box"

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The boundaries and contents of the "anatomical snuff box" will be studied. Identify and clean the tendons of abductor pollicis longus muscle [probe] and extensor pollicis brevis muscle [probe]. These tendons border the "anatomical snuff box" laterally, and the tendon of extensor pollicis longus muscle borders it medially (Figure 9.2).

Identify the radial artery, which passes deep to the tendons that border the "anatomical snuff box," and follow it distally to where it disappears between the two heads of the first dorsal interosseous muscle [distal portion of the radial artery is indicated by the probe]. Identify the superficial branch radial nerve.

Links and References:
Grant's: 6.103, 6.104, 6.116, and 6.117
Netter (1ed.): 440 and 442 (2ed.): 436 and 438
Rohen/Yokochi: 370 and 398