L7 Flashcards
COMMISSURE FIBERS
- Corpus callosum
- Anterior commissure
- Posterior commissure
- Fornix
- Habenular commissure
Composed of mylinated nerve fibers
and constitutes the efferent system
of the hippocampus that passes to
the mammillary bodies of the
hypothalamus.
Fornix
connects
the hippocampal formations of Two sides
fornix
Fornix On reaching the posterior end of the
hippocampus, arch forward above………….. and below the corpus
callosum to form the ……………….
the thalamus
posterior columns of the fornix.
The largest commissure of the brain,
Corpus callosum
Corpus callosum lies at the bottom of the longitudinal fissure (callosal sulcus). It is divided into the
rostrum
genu,
body
the splenium.
continuous with the upper end of
the lamina terminalis.
Rostrum
fibers of the genu curve forward
into the frontal lobes and form :
the
forceps minor.
The fibers in the splenium arch
backward into the occipital lobe and
form the………
forceps major.
Fibers from the sides of corpus callosum
وتثبت بقيه اللوبز
tapetum
The nerve fibers lying within the
most posterior part of the posterior
limb of the internal capsule radiate
toward the calcarine sulcus and are
known as the……………
optic radiation.
ANTERIOR LIMB OF INTERNAL CAPSULE fibers
-Frontopontine Fibers
-Thalamocortical Fibers to frontal lobe
POSTERIOR LIMB OF INTERNAL CAPSULE fibers
• Corticonuclear Fibers
• Thalamocortical fibers to parietal lobe
crosses the midline in the lamina
terminalis.
Anterior commisure
Anterior commisure traced laterally:
• A smaller or anterior bundle curves
forward on each side toward the
anterior perforated substance and
the…………………..
• A larger bundle curves posteriorly
on each side and grooves the
inferior surface of the lentiform
nucleus to reach the……………………
olfactory tract.
temporal lobes.
