Anatomy Bones and Muscles · MU Pleven

210. Regio infraclavicularis.

Covers the boundaries of the infraclavicular region, including the deltoideopectoral groove and the cephalic vein passing through the deltoideopectoral triangle. It then goes through the layers from skin to pectoralis minor, noting the two layers of pectoral fascia, and the three triangles of the deep compartment. Clinical points include the infraclavicular brachial plexus block, the skin fugor test, surgical access to the brachial plexus, and landmarks of the pectoral muscles.

Inside: 6 sections · 2 labelled pictures · 7 flashcards · 2 min

Topic 209 of 236 in the MU Pleven syllabus for Anatomy Bones and Muscles (Medicine, Year 2). The free AceMed note covers it in 6 sections, about 219 words (2 min of reading), with 7 flashcards.

In this note

  1. INFRACLAVICULAR REGION
  2. Boundaries
  3. Surface Anatomy:
  4. Clinical Significance:
  5. Deep Compartment:
  6. Clinical significance

Boundaries

  • Sup. - Clavicle
  • Inf. - 3ʳᵈ rib
  • Medi - sternum
  • lat. - Deltoideopectoralis sulcus (groove)

Forms deltoideopectoral triangle with cephalic v. pass through it.

Surface Anatomy:

  1. 1. Skin & Subcutaneous tissue.
  • Innervated by supraclavicular ns & Ant. and lat. branches of first 2 intercostal nerves.
  1. 2. Superficial fascia
  2. 3. Deep fascia (Pectoralis fascia)
  • 2 layers:
  • Superficial layer - covers the external aspect of pectoralis major
  • Deep layer (Clavipectoral fascia) - cover the deep compartment.
  1. 4. Pectoralis minor
  2. 5. Vessels & nerves.

Clinical Significance:

  • Infraclavicular Block: Clinicians use this region for infraclavicular brachial plexus blocks to provide anesthesia or analgesia for the upper limb. It can be performed without arm abduction, making it useful for patients with limited shoulder mobility[2].
  1. 2. Skin fugor test
  2. 3. Surgical approach to brachial plexus.

Deep Compartment:

Subdivided into 3 triangular segments.

  1. 1. Clavipectoral triangle: bounded btw. the clavicle & the sup. margin of pectoral minor m.
  • The NVB of fossa axillaries passes behind the lateral part of the triangle.
  1. 2. Pectoral triangle: limited within margins of pectoral minor m.
  2. 3. Subpectoral trian: btw. the inf. border of pectoralis m. & free margin of pectoralis major m.

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