Endoneurium

Epineurium

Perineurium

Medial two digits on dorsum and medial one and a half digits on palm

lateral surface of thumb on palm and thumb and half of digits 2 & 4 on dorsum

Radial three and a half digits on palm and tips of radial three and a half digits on dorsum

Wrist drop

Clawing of the hand that is most pronounced in medial fingers

Dupuytren's contracture

Medial one and a half digits on palm

Radial three and a half digits on palm

medial half of thumb on dorsum and distal half of digits 2 and three

medial one and a half digits on dorsum

Nerve demyelinates forming saltatory compartments

Degeneration of nerve into segments

Compression causes pressure gradient so tissue redistributes to areas of lower pressure

causes pressure gradients so tissue redistributes to areas of lower pressure

Fibrosis results in scarring which reduces glide and so causing nerve traction

thins epineurium so pain felt first

Causes demyelination which results in a proliferation of schwann cells and so causes re myelination

death of proximal CNS neurone resulting in complete paralysis

Apoptosis of part of axon distal to injury followed by schwann cell alignment for axon regeneration

Degeneration of axon following ischaemic damage

Palmar apponeurosis

Extensor pollicis longus

Lateral lumbricals and thenar muscles

Hypothenar muscles and medial lumbricals

5: one to every digit

10: two to every digit

8: two to each finger

9: 1 to the thumb and two to each finger

Dupuytren's contracture

Weakness

Night symptoms

Hyperextension of index fingers

Pins and needles

Wrist drop

Medial

Posterior

Lateral

Abductor pollicis brevis

Thenar muscles

Adductor pollicis brevis

Hypothenar muscles

Radial lumbricals

ulnar lumbricals

interossei

Guyon's canal and wrist drop

Carpal tunnel and dupuytren's contracture

Carpal tunnel and wrist drop

Guyon's canal and dupuytren's contracture

Compression of ulnar nerve around medial epicondyle

Compression of median nerve in carpal tunnel

Compression of ulnar nerve in Guyon's canal

Compression of radial nerve in Guyon's canal

Lateral

Posterior

Medial