New Deck Flashcards
What are the three primary functions of the cerebellum?
- Maintenance of posture and equilibrium
- Control of muscle tone
- Coordination of voluntary muscle activity
What type of tremor may result from a cerebellar lesion?
Intention tremor
A positive Romberg sign (loss of balance when the eyes are closed) suggests a lesion to which tract of the CNS?
Dentothalamic tract (the main cerebellar pathway) or dorsal column (tabes dorsalis in neurosyphilis)
What thalamic nucleus/nuclei relays Vision
Lateral geniculate nucleus (“Lateral to Look”)
What thalamic nucleus/nuclei relays Hearing
Medial geniculate nucleus (“Medial for Music”)
What thalamic nucleus/nuclei relays Proprioception, pain, pressure, touch, vibration
Lateral portion of ventral posteriornucleus (VPL, “Posterior for Proprioception, Pain”)
What thalamic nucleus/nuclei relays Facial sensation
Medial portion of ventral posterior nucleus (VML)
What thalamic nucleus/nuclei relays Motor
Ventral anterior/lateral nuclei
What thalamic nucleus/nuclei relays Limbic function
Dorsomedial, anterior nuclei
Name the largest thalamic nucleus:
Pulvinar
What is the function of the pulvinar?
Integration of visual, auditory, and somesthetic input
Which portion of the internal capsule contains fibers of the corticobulbar tract?
The genu
Which portion of the internal capsule contains fibers of the corticospinal, spinothalamic, visual, and auditory tracts?
The posterior limb
Which arteries supply the posterior limb of the internal capsule?
Perforating branches of the anteriorchoroidal artery and lenticulostriate arteries
What hypothalamic nucleus regulates the release of gonadotropic hormones
Medial preoptic nucleus (which contains the sexually dimorphic nucleus)
