Spinal Cord Anatomy: Meninges and Epidural Fat

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Where do we find motor neurons in the grey matter?

In the commissure

In the anterior horn (correct)

In the central canal

In the posterior horn

What is the function of the commissure in the grey matter?

It connects one antimere to the other (correct)

It contains the lumen of the neural tube

It houses sensory neurons

It forms the ventral motor root of the spinal nerve

What is the role of ependymal cells in the grey matter?

Receive sensory information

Connect one antimere to the other

Form the ventral motor root of the spinal nerve

Line the central canal (correct)

Where is the central canal located in relation to the grey matter?

Within the lumen of the neural tube Signup and view all the answers

What happens to the marginal layer as we move downwards along the spine?

It becomes less evident Signup and view all the answers

Which part of the grey matter contains sensory neurons?

Posterior horn Signup and view all the answers

What do motor axons form in the grey matter?

Ventral motor root of the spinal nerve Signup and view all the answers

What decreases progressively as we move inferiorly in the grey matter?

Size of white matter Signup and view all the answers

Where does the CSF flow after entering the fourth ventricle?

Downwards through the central canal Signup and view all the answers

What is the purpose of the liquoral circulation (circulation of the CSF)?

To carry waste products away from the nervous tissue Signup and view all the answers

Where does the reabsorption of CSF occur within the subarachnoid space?

At the level of arachnoid granulations Signup and view all the answers

Where is the central canal of the spinal cord connected to, and what does it receive?

It is connected to the fourth ventricle and receives cerebrospinal fluid Signup and view all the answers

What structures facilitate communication between the ventricular system and the subarachnoid space?

Lateral foramen of Luschka Signup and view all the answers

What forms the liquoral system, and what flows within this system?

Ventricular system; cerebrospinal fluid Signup and view all the answers

What is the main purpose of performing a lumbar puncture to sample cerebrospinal fluid?

To diagnose ongoing infections in the nervous system Signup and view all the answers

Why is the Lumbar Cistern considered an important anatomical structure for performing lumbar punctures?

It only contains rootlets of the nerves, providing a safe space for sampling CSF Signup and view all the answers

What is the significance of enlarged ventricular cavities in relation to aging and the brain's consistency?

It compensates for encephalic volume loss and age-related brain changes Signup and view all the answers

What role do subarachnoid cisterns and enlargements of the subarachnoid space play in the process of lumbar puncturing?

They provide a safe space for inserting the needle to sample CSF Signup and view all the answers