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KAYVON IZADI MD | HAND WRIST ELBOW ORTHOPEDIC SURGEON
  • Home
    • About Dr. Izadi
    • What's a Hand Surgeon?
  • Hand
    • Hand Anatomy
    • Hand Arthritis >
      • Knuckle Arthritis
      • Thumb Arthritis
    • Dupuytren's Contracture
    • Fingers & Thumb >
      • Baseball (Mallet) Finger
      • Basketball Finger Injuries
      • Fingertip Injuries
      • Jammed Finger
      • Jersey Finger
      • Trigger Finger
      • Gamekeeper's Thumb
      • Skier's Thumb
      • Thumb Sprain
    • Ganglion Cysts
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      • Extensor Tendon Injuries
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Hand Anatomy

Hand anatomy and function are highly complex. The thumb alone is controlled by nine individual muscles, which are controlled by the radial, median, and ulnar nerves. The thumb movement is so complex that there are six unique descriptive terms for describing only the direction of the thumb joint at the base of the thumb. If you play an instrument, such as the guitar or the piano, you are likely aware of how the slightest ache or pain affects your finger positioning required to play those instruments. 
​

Hand and wrist have twenty seven bones. The hand is innervated by the median, ulnar, and radial nerves, which have sensory and motor components. The muscles of the hand are divided into intrinsic and extrinsic groups. The tendons are divided into flexors and extensors.​

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  • Home
    • About Dr. Izadi
    • What's a Hand Surgeon?
  • Hand
    • Hand Anatomy
    • Hand Arthritis >
      • Knuckle Arthritis
      • Thumb Arthritis
    • Dupuytren's Contracture
    • Fingers & Thumb >
      • Baseball (Mallet) Finger
      • Basketball Finger Injuries
      • Fingertip Injuries
      • Jammed Finger
      • Jersey Finger
      • Trigger Finger
      • Gamekeeper's Thumb
      • Skier's Thumb
      • Thumb Sprain
    • Ganglion Cysts
    • Hand Fractures
    • Nail Bed Injuries
    • Hand Numbness & Tingling
    • Hand Pain
    • Tendon Injuries >
      • Extensor Tendon Injuries
      • Flexor Tendon Injuries
  • Wrist
    • Wrist Anatomy
    • Wrist Arthritis
    • Wrist Arthroscopy
    • Carpal Tunnel Syndrome
    • Cyclist's Palsy
    • de Quervain's Tendonitis
    • Wrist Fractures >
      • Scaphoid Fracture
      • Scaphoid Non-Union
      • Wrist Fracture
    • Ganglion Cysts
    • Golf Injuries
    • Kienbock Disease
    • Wrist Pain
    • Snowboarding Injuries
  • Elbow
    • Elbow Anatomy
    • Elbow Arthritis
    • Cubital Tunnel Syndrome
    • Distal Biceps Tendon Rupture
    • Elbow Fractures
    • Golfer's Elbow (Medial Epicondylitis)
    • Olecranon Bursitis
    • Elbow Pain
    • Tennis Elbow (Lateral Epicondylitis)
  • Work Comp
    • What is Workers Compensation?
    • Workers Compensation Appointment
    • For Case Workers
  • PATIENTS
    • New Patients
    • Second Opinion
    • Surgery >
      • Wide Awake Hand Surgery
      • Anesthesia
      • Before Surgery
      • Day of Surgery
      • After Surgery
      • Smoking & Wound Healing
    • Steroid Injections
    • Patient Stories
  • Contact
    • Dr. Izadi's Blog