Basal Forebrain
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The basal forebrain
- Basal Ganglia: Putamen, Caudate (head)
- Internal capsule, Frontal horn of the lateral ventricle, Corpus callosum, Hypothalamus, Medial temporal lobe (limbic lobe), and Insula.
In between the subcallosal gyrus and the nucleus accumbens (in the anterior diagram), lies the diagonal band of Broca, which categorizes within the basal forebrain.
- Superiorly, in midline, lies the septal nuclei (later we'll see their relationship to the bed nucleus of the stria terminalis).
- The substantia innominata lies lateral to the hypothalamus and beneath the basal ganglia.
- The anterior commissure lies above the substantia innominata and below the basal ganglia.
- The basal nucleus of Meynert lies within the substantia innominata.
The basal nucleus of Meynert is variably considered to be either synonymous with the substantia innominata or to reside within this "unnamed substance" as it is drawn, here. The ventral pallidum lies just below the anterior commissure.
- The amygdala extends to the surface of the temporal lobe.
- The corticomedial division (here, it categorizes within the basal forebrain).
- The basolateral division.