Week 1 Flashcards
Define the postcentral and precentral gyri as sensory or motor
Postcentral = sensory
Precentral = motor
What is the role of Brocca’s area, its location and effect of damage?
Motor aspects of speech (speech associated gestures)
Inferior frontal gyrus - usually left side
Expressive aphasia, non-fluent, slow speech
Is potassium ion concentration higher inside or outside of a nerve cell?
Much higher concentration inside
Between which vertebrae is the inferior end of the adult human spinal cord located?
L1 and L2
Which spinal tract carries information about pain and temperature?
Spinothalamic
Which artery supplies blood to the lower third of the spinal cord?
Major anterior medullary (segmental ) artery
State the role of the basal ganglia and list the 3 parts.
Influence motor activity and motor control - ‘action selection’ centres
- Corpus striatum - caudate nucleus, putamen, globus pallidus
- Sub-thalamic nuclei
- Substantia nigra
Damage to the substantia nigra results in which movement disorder?
Parkinson’s
Damage to the striatum of the basal ganglia results in which movement disorder?
Huntington’s
Where is CSF made? What is it’s role?
Choroid plexus within the ventricular system of the brain
Mechanical and immunological protection to the brain and spinal cord
Where is CSF reabsorbed?
Venous drainage of the head
What connects the third and fourth ventricles?
Aqueduct of midbrain
What is the principal arterial blood supply for the brain?
Internal carotid and vertebral
What do each of the following detect?
1. Free nerve endings
2. Merkel’s disc
3. Meissner’s corpuscle
4. Paninian corpuscle
5. Ruffini’s ending
- Pain, temperature
- Touch
- Touch
- Vibration
- Stretch
What are the sensory receptors of Aa axons from skin?
Proprioceptors of skeletal muscle
