Flashcards in 3D Neuroanatomy Review Deck (21):
The lateral ventricles are broken into three horns: _____________.
anterior, posterior, and inferior
What is the interthalamic adhesion?
A piece of the thalamus that bridges the two lateral halves
The caudate closely follows the ______________.
lateral ventricles (just superior and lateral to it)
Where the caudate and putamen come together is called the ____________.
Inside the putamen is the __________.
The temporal lobe has two major parts: ___________.
the amygdala and hippocampus
The amygdala is __________ to the hippocampus.
The mammillary bodies are __________ to the hypothalamus.
Contrast the consistencies of the amygdala and the hippocampus.
The amygdala is "soft and fluffy – like a marshmallow," while the hippocampus is spiraled "like a seahorse or cinnamon roll."
Trace the path of the fornix.
It picks up axons from the temporal lobes (just superior to the hippocampus), and then follows the path of the lateral ventricles. They fuse and become inferior to the lateral ventricles. Ultimately, they diverge again and "dive bomb" straight down onto the mammillary bodies.
The septum pellucidum is _________ to the fornix.
The anterior commissure is superior to the __________.
The fornix hangs onto the bottom of the ____________.
The insula is involved in _____________.
empathy and imagining other people's points of view (the INSULA keeps you from being INSULAr)
Hemorrhaging the middle meningeal leads to intracranial (lenticular) bleeding that can cause herniation of what structure?
The uncus (through the floor of the tentorium cerebelli)
The oculomotor nerve passes between which two arteries as it exits the brainstem?
The posterior cerebral artery and the superior cerebellar artery
The inferior terminus of the fasciculus cuneatus lies at which vertebra?
Are the nucleus gracilis and nucleus cuneatus ipsilateral or contralateral to their fasciculi?
Ipsilateral; these cells send axons across the midline to the medial lemniscus and thence to the somatosensory cortex
Trace the path of pain sensation.
Pain sensed -> axon synapses at dorsal root ganglion -> axon synapses on cell in ipsilateral substantia gelatinosa -> axon crosses midline via anterior white commissure and goes up via the anterolateral tract -> axon synapses on medial lemniscus -> axon proceeds to cortex.
Where is the lateral corticospinal tract?
Just anterior and lateral to the posteromarginal nucleus