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Home » Axillary Nerve: Branches, Applied Anatomy

Axillary Nerve: Branches, Applied Anatomy

July 26, 2023 by Joankessler parkland Leave a Comment

 Axillary Nerve

  • Axillary nerve is one of the two large terminal branches of the posterior cord of branchial plexus

Axillary nerve Course:

  • From its origin, it passes backwards between subscapularis & teres major through the quadrangular space
  • Here it lies in contact with the surgical neck of the humerus, just below the capsule of the shoulder joint

Back Of The Neck Short Question And Answers

Read And Learn More: BDS Previous Examination Question And Answers

Axillary nerve Branches:

  1. Muscular branchsupply deltoid & teres minor muscles
  2. Articular branch-supply shoulder joint
  3. Cutaneous branchsupply upper lateral cutaneous nerve of arm
  4. Branch to the shoulder joint which is divides into
    • Anterior branch
      • Supplies deltoid, pierces muscle & reaches skin
    • Posterior branch
      • Motor nerve to teres minor
      • Cutaneous nerve to the arm
      • Supplies posterior fibres of deltoid

Axillary nerve Applied Anatomy:

  • The nerve may be injured during downward dislocation of shoulder joint
  • It may be injured during fracture of surgical neck of humerus
  • Injury to the nerve paralyses the deltoid muscle causing flattening of shoulder
  • Wrongly injected drugs like penicillin may cause paralysis of the nerve

Shoulder And Axillary Region Anatomy Diagram

Question 2. Spinal Duramater.
Answer:

  • It is a thick, tough fibrous membrane which forms a loose sheath around the spinal cord
  • It is continuous with the meningeal layer of the cerebral duramater

Spinal Duramater Extend:

  • From the foramen magnum to the lower border of the second sacral vertebrae

Spinal Duramater Significance:

  • It gives tubular prolongations to the dorsal & ventral nerve roots & to the spinal nerves as they pass through the intervertebral foramina

Filed Under: Anatomy

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