Epineurium

Endoneurium

Perineurium

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

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

Clawing of the hand that is most pronounced in medial fingers

Wrist drop

Dupuytren's contracture

medial one and a half digits on dorsum

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

Medial one and a half digits on palm

Radial three and a half digits on palm

Degeneration of nerve into segments

Nerve demyelinates forming saltatory compartments

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

causes pressure gradients so tissue redistributes to areas of lower pressure

thins epineurium so pain felt first

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

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

Degeneration of axon following ischaemic damage

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

death of proximal CNS neurone resulting in complete paralysis

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

Weakness

Dupuytren's contracture

Hyperextension of index fingers

Night symptoms

Wrist drop

Pins and needles

Posterior

Medial

Lateral

Abductor pollicis brevis

interossei

ulnar lumbricals

Hypothenar muscles

Thenar muscles

Radial lumbricals

Adductor pollicis brevis

Carpal tunnel and wrist drop

Guyon's canal and dupuytren's contracture

Guyon's canal and wrist drop

Carpal tunnel and dupuytren's contracture

Compression of radial nerve in Guyon's canal

Compression of median nerve in carpal tunnel

Compression of ulnar nerve in Guyon's canal

Compression of ulnar nerve around medial epicondyle

Posterior

Medial

Lateral