L5 General Morphology and Surface Anatomy Flashcards
what is the insula concealed by?
lateral (Sylvian) sulcus/fissure
what sulcus surrounds the insula?
circular sulcus
what sulcus is almost continuous with the cingulate sulcus?
the collateral sulcus
what does the medial ext. of the central sulcus divide?
frontal and parietal lobes
what does the parieto-occupital sulcus divide?
parietal and occipital lobes
what does the superior ext of the limbic lobe sit between?
corpus collasum and cingulate sulcus
what does the cingulate sulcus separate?
frontal and parietal lobe from limbic lobe
what is the track of CN I olfactory n.?
olfactory bulb – olfactory tract – olfactory cortex
what is the track of CN II optic n.?
optic chiasm – optic tract – lateral geniculate body
what is the track of CN III oculomotor n.?
interpeduncular fossa
what is the track of CN IV trochlear n.?
caudal to inferior colliculi
what is the track of CN V trigeminal n.?
pons
what is the track of CN VI abducens n.?
ponto-medullary junction
what is the track of CN VII facial n.?
cerebellopontine angle (tumors frequent)
what is the track of CN VIII vestibulocochlear n.?
cerebellopontine angle (tumors frequent)
what is the track of CN IX glossopharyngeal n.?
postolivary sulcus
what is the track of CN X vagus n.?
postolivary sulcus
what is the track of CN XI Spinal accessory n.
postolivary sulcus
what is the track of CN XII hypoglossal n.?
medulla, preolivary sulcus
injury to frontal lobe could knock out what n.?
CN 1 olfactory - smell
what could happen in diecephalic injuries?
blindness
what could happen in midbrain injuries?
knock out CN 3 and 4
what could happen in herpes was lying dormant in trigeminal n.?
could attack temporal lobe - seizures
the ventral and lateral column are what?
motor and sensory
what does white matter contain?
efferent (motor) and afferent (somatosensory) tracts that form 3 columns
What does the lateral/intermediate horn (ventral horn enlargment) do at spinal segments T1-L2 and S2-S4?
autonomic function
what are denticulate ligaments?
given off from pia mater - fuses with arachnoid and dura mater
what is the filum terminale?
pia mater caudal extension that joins with dura and attaches to coccyx
what is the opercula area?
parts of the frontal, parietal and temporal lobe that covers the insula
where are Broca’s motor speech areas using Brodmann’s map?
left hemi
area 45 - pars triangularis
area 45 - pars opercularis
where is Wernicke’s receptive speech area using Brodmann’s map?
left hemi
post. portion of area 22 - planum termporale
where is primary motor cortex using Brodmann’s map?
area 4 - pre central gyrus
where is the primary somatosensory cortex using Brodmann’s map?
areas 1,2,3 - postcentral gyrus
what happens if you injure area 17 on Brodmann’s map?
might go blind
what was Brodmann’s map based on?
cytoarchitecture - histology etc.
what does the superior temporal gyrus overlap?
Brodmann’s area 22 - damage = language deficit = spoken and written = aphasia
what happens to the uncus with an epidural hemorrhage?
punches through tentorial notch and compresses the midbrain = coma
what are the functions of the piriform cortex, the peri-amygdaloid cortex and the entorhinal cortex?
process olfactory info - primitive processing - if something that smells makes you sick, the next time you smell it you want to avoid it.
the tissue around what structure is vital for vision?
calcarine fissure (sulcus)
what does the fornix connect?
hippocampus and the mamillary bodies
what structure connects that two thalami?
massa intermedia
