Podcast
Questions and Answers
What structure does the median nerve pass under as it enters the hand?
What structure does the median nerve pass under as it enters the hand?
Which muscles are supplied by the median nerve distal to the carpal tunnel?
Which muscles are supplied by the median nerve distal to the carpal tunnel?
What does the palmar cutaneous branch of the median nerve supply?
What does the palmar cutaneous branch of the median nerve supply?
Which digits receive sensory innervation from the median nerve?
Which digits receive sensory innervation from the median nerve?
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Which bones form the borders of the carpal tunnel?
Which bones form the borders of the carpal tunnel?
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Study Notes
Median Nerve Pathway in the Hand
- The median nerve passes through the carpal tunnel.
- The carpal tunnel is located deep to the flexor retinaculum.
- The tunnel is bordered by the scaphoid and trapezoid bones laterally and the pisiform and hamate bones medially.
- The median nerve travels alongside nine flexor tendons (FDS, FDP, FPL).
- Distal to the tunnel, the median nerve innervates two and a half thenar muscles and the first two lumbrical muscles.
- Sensory fibers from the median nerve supply the palm, sides of the first three fingers, half of the fourth finger, and distal portions of the corresponding dorsal surfaces.
- The palmar cutaneous branch of the median nerve, which supplies the central palm, originates proximal to the flexor retinaculum and travels superficially to it; therefore, it does not pass through the carpal tunnel.
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Description
Explore the key structures and pathways of the median nerve as it travels through the carpal tunnel in the hand. This quiz covers its anatomical landmarks, innervation details, and sensory functions, providing a comprehensive understanding of the median nerve's role in upper limb physiology.
