Anatomy · MU Sofia

Topographic · 263.264 Pamler and Dorsum Region

Covers the posterior region of the wrist, including the skin and fascia, the extensor retinaculum and its six osteo-fibrous canals, then moves to the palm: its thick skin with three deep lines and their functional meaning, the subcutaneous nerves, and the palmar aponeurosis. It lists the structures of the midpalmar space from superficial to deep, the thenar septum of Kanaveli, and the dorsum of the hand, covering its skin, fascia, extensor tendons and dorsal blood vessels. Several labelled pictures accompany the text.

Inside: 14 sections · 3 labelled pictures · 16 flashcards · 5 min

Topic 238 of 264 in the MU Sofia syllabus for Anatomy (Dental Medicine, Year 2). The free AceMed note covers it in 13 sections, about 648 words (5 min of reading), with 16 flashcards.

In this note

  1. Introduction
  2. Posterior Region:
  3. PALMAR Region.
  4. Skin :
  5. Subcutaneus tissue:
  6. Palmar Aponeurosis & fascia
  7. DORSUM of the hand
  8. Superficial fascia
  9. Cutaneous Nerves :
  10. Deep fascia
  11. Extensor muscles tendons
  12. Dorsal aponeurosis
  13. Superficial blood vessels

Introduction

262 cont.

Posterior Region:

  1. 1. Skin and Fascia:
  • Coarser and more mobile than the anterior carpal region.
  • Superficial fascia contains minimal adipose tissue.
  • Venous vessels present:
  • V. basilica and v. cephalica.
  • Terminal segments of n. cutaneus antebrachii posterior.
  • R. superficialis n. radialis and r. dorsalis n. ulnaris.
  1. 2. Retinaculum mm. Extensorum:
  • Transverse fibrous band strengthening the fascia antebrachii.
  • Fuses with tendons of extensor muscles (2nd to 5th finger).
  • Forms six osteo-fibrous canals on the dorsal wrist:
  • Transmit tendons of extensor muscles.

Skin :

  • Thickness: The skin of the palm is thick and tough.
  • Lines: Three deep, permanent lines are characteristic:
  • Distal Line
  • Middle Line
  • Proximal Line
  • Attachment: The skin is tightly connected to the underlying structures by fibrous strands, especially along these lines.

Functional Significance of Lines:

  • Distal and Middle Lines: Reflect the repeated flexion of the 2nd to 5th fingers.
  • Proximal Line: Reflects the movement of thumb opposition.

Subcutaneus tissue:

  • Contains small veins and cutaneous nerves.
  • Nerves:
  • R. Palmaris N. Mediani
  • R. Palmaris N. Ulnaris
  • Small branches from N. Digitales Palmares Communes

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