Lab 4: Subcortical structures

• largest commicural fiber goupr
• communicate homologous cortial areas
• may propagate general seizures

Both involved in the limbi system for emotions regulation

Septum pellucidum

communicate the temporal lobes of the 2 cerebral hemispheres

• Largest part of the epithalamus
• secretes melatonin
• involved in circadian rhytms (day/night cycles)

Relay station for somatosensory pathways (except for olfaction).  It also filter input to cerebral cortex coming from the Basal Ganglia cirvuitry

Tissue that joins both thalami by piercing through the 3rd ventricle

• control endocrine secretion and autonomic regulation
• modulates primal urges and survival mechanisms

Hypothalamic sulcus

• Point of decussation of the optic nerve before it becomes the optic tract
• only nasal fibers decussate

part of the hyopthalamic floor located between the optic chiasm and infundibulum.

• ANT lobe - multiple hormones
• POST lobe - Stores ADH and oxytocin

Infundibulum and tuber cinereum

Limbic system

bands of white matter

Internal capsule

External capsul

Extreme capsule

• nuclei of dopaminergic cell bodies located in the midbrain, POST to the cerebral peducles.
• sends output to the striatum

involved in learning and memory

• Group of nuclei involved in sequencin and initiation of voluntary movement
• output to the thalamus, and to the motor cortices

• unknown
• lateral to the nucleus lentiform

• Caudate and Putamen
• receives input from the substatia nigra

• Putamen and globus pallidus
• sends output to subthalamus and thalamus for motor control.

it is the point of the INT capsule's flexure and divides it into anterior and POST limbs

• subcortical white matter
• corticospinal tract fibers are located in the corona as well as other ascending pathways that will terminate in the cerebral cortex