Axial Image Through The Thalamus And Internal Capsule

(Figures 1-8 and 1-9). The location of the structures shown in the figures should be known.

Internal Capsule Globus Pallidus

Corpus callosum

Septum pellucidum

Putamen Fornix

Globus pallidus

Third ventricle

Corpus callosum (splenium)

Superior colliculus

Pineal gland

Lateral ventricle

Caudate nucleus

Internal capsule (genu)

Internal capsule (posterior limb)

Thalamus

Caudate nucleus (tail)

Lateral ventricle (trigone)

Inferior colliculus

Visual cortex

Internal capsule (anterior limb)

Figure 1-8. Axial section of the brain ar the level of the internal capsule and basal ganglia. Note that the internal capsule has an anterior limb, a genu, and a posterior limb. Note also that the corpus callosum is sectioned through the genu and splenium.

Trigone

Superior sagittal sinus

Ventricular Trigone Axial

Figure 1-9. Axial magnetic resonance imaging section at the level of the internal capsule and basal ganglia. Note that the caudate nucleus bulges into the frontal horn of the lateral ventricle. In Huntington's disease, there is a massive loss ot 7-aminobutyric acid (GABA)-ergic neurons in the caudate nucleus that results in hydrocephalus ex vacuo. A lesion of the genu ot the internal capsule results in a contralateral weak lower face with sparing of the upper face. This is a T1-weighted image.

Lateral ventricle

Septum pelludicum and fornix

Putamen Globus

Insula

External Velum interpositum

Superior sagittal sinus

Corpus callosum (genu)

Caudate nucleus

Internal capsule (anterior limb)

Internal capsule (genu)

Internal capsule (posterior limb)

Thalamus and third ventricle

Trigone callosum (splenium)

Visual radiations Visual cortex

Figure 1-9. Axial magnetic resonance imaging section at the level of the internal capsule and basal ganglia. Note that the caudate nucleus bulges into the frontal horn of the lateral ventricle. In Huntington's disease, there is a massive loss ot 7-aminobutyric acid (GABA)-ergic neurons in the caudate nucleus that results in hydrocephalus ex vacuo. A lesion of the genu ot the internal capsule results in a contralateral weak lower face with sparing of the upper face. This is a T1-weighted image.

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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Responses

  • annemari
    Where is the trigone of the brain on an axial image?
    6 years ago

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