The interosseous compartments of the hand are four narrow spaces between neighbouring metacarpals, enclosed by palmar and dorsal interosseous fascia. They contain the dorsal and palmar interossei, supplied by the deep branch of the ulnar nerve.
| Location | Between the metacarpal bones. |
|---|---|
| Boundaries |
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| Contents |
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Hold the muscles that spread and close the fingers and help flex the metacarpophalangeal joints.
In hand compartment syndrome these compartments are opened through dorsal incisions over the second and fourth metacarpals. Wasting of the interossei, especially the first dorsal interosseous, is an early sign of ulnar nerve damage and causes hollowing between the metacarpals.
Hollowing between the metacarpal bones on the back of the hand from ulnar neuropathy or motor neuron disease.
Raised pressure in the interosseous compartments after crush or fracture, causing pain on passive finger abduction and adduction.
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