Anatomy of the Upper Limb

  breadcrumb arrow   Rahul's Noteblog   breadcrumb arrow   Notes on Anatomy   breadcrumb arrow   Anatomy of the Upper Limb

Erb's palsy:

Injury in C5-C6; waiter's tip; weak shoulder and anterior arm; affected axillary, suprascapular, and musculocutaneous nerves.

Thoracic outlet syndrome:

Injury in C8-T1; weak forearm and hand muscles; claw hand; ape hand; may include Horner syndrome.

Nerves of the Upper Limbs:

Musculocutaneous nerve:

Flex elbow and supination; loss of elbow flexion; weak supination; loss of sensation on lateral aspect of forearm.

Median nerve:

Flex wrist and digits; pronation; opposition; flex metacarpophalangeal; extend proximal interphalangeal and distal interphalangeal of digits 2, 3.

Injury at elbow: loss of flexion of digits; ape or simian hand.

Injury at wrist: ape or simian hand; claw hand; carpal tunnel compression or wrist laceration.

Ulnar nerve:

Flex wrist and digits 4 and 5; abduct and adduct digits 2-5; flex metacarpophalangeal; extend proximal interphalangeal and distal interphalangeal of digits 4, 5.

Injury at elbow: weakened wrist flexion; claw hand; sensory loss of digits 5 and one half of 4.

Injury at wrist: loss of abduction and adduction of digits; claw hand; sensory loss on digits 5 and one half.

Axillary nerve:

Abduction and lateral rotation of shoulder; abduction of arm; damaged by shoulder dislocation or injury to surgical neck of humerus.

Radial nerve:

Injury at axilla: extend digits, wrist, and elbow; supination; Saturday night palsy; weakened extension of shoulder; sensory loss on posterior arm, forearm, and hand; wrist drop; damaged by shoulder dislocation.

Injury at arm: wrist drop.

Injury at wrist: sensory loss on posterior hand.

Arterial supply of upper arm:

• Subclavian artery, axillary artery, brachial artery, radial artery, ulnar nerve.

Volkmann contracture:

• Compression of brachial artery; ischemia of hand.

Elbow dislocation:

Injured ulnar nerve, median nerve, brachial artery.

Carpal Tunnel Syndrome:

Compressed median nerve.

Additional Notes:

• Latissimus dorsi paralyzed: cannot extend.

• Winged scapula: long thoracic nerve injury; can't do push-ups.

• Most commonly fractured hand bone: scaphoid.

• Most common obstetrical brachial plexus injury: C5, C6 which causes Erb's palsy.

Additional Reading:

Histology and Cytology

1. Cell Components
2. Nervous Tissue
3. Muscle Tissue
4. Lymphoid Tissue
5. Integument
6. Respiratory System
7. Gastrointestinal System
8. Renal/Urinary System
9. Male Reproductive System
10. Female Reproductive System

Gross Anatomy

1. Back and Nervous System
2. Thorax
3. Abdomen, Pelvis, and Perineum
4. Upper Limb
5. Lower Limb
6. Head and Neck
7. Chest Wall
8. Shoulder

Anatomy Videos

1. Video of Musculoskeletal Examination in a Clinical Setting
1. Video of HEENT Examination in a Clinical Setting

Related Topics

1. Jugular Venous Distention Workup

Medical Images

Useful Medical Images & Diagrams (link opens in a new window)

Random Pages:

My Experience during the Iraqi Invasion of Kuwait My First Computer - Pentium with Windows 95
Video of me playing Hagood Hardy`s "Children of the Dream" Notes on Muscle Tissue
Notes on Axillary Artery Aneurysm Notes on Actinomyces
Notes on Gluconeogenesis Notes on Correlational Techniques
Effects of Drugs on Fetal Development Digestion FAQ, Defecation reflex, etc.
Notes on Basic Gastrointestinal Physiology What is Time?
Video of American Robin feeding her chicks What is an ELEK`s Test?
Why did I decide to become a doctor? Medical School Admissions Essay Video: Titanic Piano Theme: The Portrait
Corporate Failure: The Enron Case My Experience during the Iraqi Invasion of Kuwait
USMLE Blood Lab Values Regulation of Heart Rate by Autonomic Nervous System
Images of Antibodies Video of me playing Titanic Piano Theme: The Portrait
Notes on Gastrointestinal System Differentiation and Anatomy of a Blastocyst
Notes on Cell Components Notes on Nervous Tissue
Voices from Hell: My Experience in Mussoorie, India Video of Cardiology Examination in a Clinical Setting

Please Do Not Reproduce This Page

This page is written by Rahul Gladwin. Please do not duplicate the contents of this page in whole or part, in any form, without prior written permission.