Set of lumbricals of hand

Looks like

Four small worm-like muscles in the palm, starting from the deep finger tendons.

What it does

Bend the knuckles while straightening the finger joints, as in holding a card.

Keeping it well

Their split nerve supply (median and ulnar) helps doctors locate nerve damage.

Related conditions

• Botulism
• Carpal tunnel syndrome
• De Quervain's tenosynovitis
• Dupuytren's contracture & trigger finger
• Fibromyalgia
• Frailty & falls in older age
• Ganglion cyst
• Heat exhaustion & heatstroke
• Juvenile idiopathic arthritis
• Malnutrition & refeeding syndrome
• Muscular dystrophy
• Polymyalgia rheumatica
• Pseudogout (calcium pyrophosphate disease)
• Raynaud's phenomenon
• Repetitive strain & overuse injury
• Rhabdomyolysis
• Rheumatoid arthritis
• Sarcoma
• Sarcopenia
• Tetanus