neuroradiology of deep brain structures

Question 1

what makes up the Lenticular nucleus

Answer 1

Putamen & globus pallidus

Question 2

what makes up the striatum

Answer 2

caudate nucleus & putamen

Question 3

what makes up the corpus striatum

Answer 3

caudate nucleus, putamen & globus pallidus

Question 4

fMRI

Answer 4

• BOLD contrast – reflects blood flow changes secondary to neuronal change
• simple or complex tasks compared with rest state
• statistical analysis shows ‘activation’
• can be used in-operative

Question 5

hazards of MRI

Answer 5

• projectile effect – magnetic force can pull objects towards the scanner at high speeds
• heating – radiofrequency waves used in MR imaging heat up tissue and metal
• implants – can malfunction, can feel magnetic force – twist and move

Question 6

physiological effects of MRI

Answer 6

• peripheral nerve stimulation
• rapid head motion: vertigo, nausea , metallic taste
• loud noise