[Andrew Wagner]

Hello,

In reference to the same presentation on neuroanatomy and neuroscience.

The Blood supply to the posterior limb of the nternal capsule is said to be the posterior cerebral artery.

The posterior limb of the internal capsule is supplied by the lenticulostriate branches of the MCA. Sometimes the ACA, but not often.

References:
http://www.umassmed.edu/strokestop/module_three/module_fr.html
http://stanfordmedicine25.stanford.edu/the25/ics.html

Andrew Wagner, PT, DPT

[Andrew Wagner]

Hello,

In reference to the same presentation on neuroanatomy and neuroscience.

The autonomic nervous system section states that the sympathetic nervous system causes “pupillary constriction”. The sympathetic nervous system causes pupillary dilation, not constriction. Horner’s sign, which is seen with PICA strokes causes an ipsilateral constriction of the pupil due to loss of sympathetic input (therefore impairing the normal pupillary dilation).

Andrew Wagner, PT, DPT

[Andrew Wagner]

Hello,

Just working my way through the neuroanatomy module and it says that the tectospinal tract turns the head toward sound but I believe the role of this tract is turning the head in response to visual stimuli. The super colliculus of the midbrain receives input from the optic nerves as part of the visual pathway and transmits the information to the contralateral cervical spinal cord via this tract.

Thanks! Great stuff so far.

Andrew Wagner, PT, DPT

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