Thalamus

Diencephalon structures

• Thalamus

• Hypothalamus

• Pineal gland

Structures of the diencephalon surround the _____ ventricle

third

Pineal gland

Pineal gland

Overall, the thalamus acts to _____ and _____ information

integrate, relay

Signals relayed by thalamic nuclei

sensory and motor

1

Interthalamic adhesion (massa intermedia): connects both halves of thalamus

2

Thalamus

Anterior nucleus (ANT) function

learning, memory, emotions

Lateral geniculate nucleus (LGN) function

vision

Medial geniculate nucleus (MGN) function

hearing

Ventral anterior (VA) and ventral lateral (VL) function

main motor thalamic relays; movement planning, movement control

Ventral posterior lateral (VPL) function

touch, limb position sense, pain, thermal sense from the body

Ventral posterior medial (VPM) function

touch, limb position sense, pain, thermal sense from the face

1

PUL

2

MGN

3

LGN

1

PUL

2

MGN

3

LGN

1

ANT

2

PUL

ANT

1

PUL

2

MGN

3

LGN

The _____ contains a high conc. of ascending (sensory) and descending (motor) fibers

internal capsule

1

Ascending (sensory) fibers

2

Descending (motor) fibers

3

Internal capsule

Internal capsule component: Posterior limb

Fibers: _____

Corticospinal fibers; somatosensory fibers (touch/pain)

Internal capsule

Bundle of projection fibers connecting the cortices of the brain with the brainstem via the internal capsule…

corona radiata