55 Questions
Which part of the body is innervated by the trigeminal nerve (CN V)?
Face & anterior scalp
Which spinal nerves have different distributions for sensory and motor information?
Ventral & dorsal rami
Which spinal segment innervates the great (big) toe?
L4
What is the key dermatome for the middle finger?
C7
Which connective tissue layer surrounds the spinal cord and nerve roots, acting as a 'shrink wrap'?
Pia mater
In carpal tunnel syndrome, which nerve is often compressed leading to symptoms like tingling and numbness?
Median nerve
Which layer of the meninges is described as delicate, avascular, and semitransparent?
Arachnoid mater
What type of information is carried by the Median nerve when it functions properly?
Both sensory and motor information
Which layer of the meninges is described as tough and dense connective tissue that covers the nerve roots like a sleeve?
Dura mater
Which structure in the spinal cord does NOT participate in forming a plexus?
Dorsal ramus
Which region of the spinal cord gives rise to the Cervical Plexus?
C1-C4 ventral rami
In which segment of the spinal cord do the ventral rami form intercostal nerves?
T12
Which spinal nerve region supplies the upper limb through the Brachial Plexus?
C5-T1 ventral rami
Which nerve is known as the longest and thickest nerve in the body?
Sciatic nerve
Which spinal cord region is responsible for forming somatic plexuses that innervate the lower extremities just above the sacrum?
L5-S1 ventral rami
Where is the Filum terminale anchored?
To the coccyx
Where is the Lumbar Cistern located?
In the lumbar region
Which spinal region houses the Cauda Equina?
Lumbar region
What is the tapered end of the spinal cord known as?
Conus medullaris
What is the purpose of the Denticulate ligament in the spinal cord?
Secures the conus medullaris in place
Which structure is responsible for anchoring the spinal cord within the vertebral canal and is composed of pia mater extensions?
Denticulate ligament
What is the bundle of nerve roots that extend from the conus medullaris called?
Cauda equina
Which structure is a fibrous extension of the conus medullaris that anchors the spinal cord to the coccyx?
Filum terminale
Where is the lumbar cistern located within the spinal cord?
Between the conus medullaris and the filum terminale
Which of the following structures is NOT involved in transmitting sensory information within the spinal cord?
Ventral ramus
What is the primary function of the denticulate ligament?
To anchor the lateral sides of the spinal cord to the dura mater and vertebral canal wall
Which structure is located within the lumbar cistern of the subarachnoid space?
Cauda equina
What is the function of the filum terminale?
To anchor the inferior end of the spinal cord (conus medullaris) to the coccyx
Which structure forms the tapered, inferior end of the spinal cord?
Conus medullaris
What is the lumbar cistern of the subarachnoid space a common location for?
Lumbar puncture (spinal tap)
What is the function of the denticulate ligament?
Connects the spinal cord to the dura mater
Where is the lumbar cistern located in the spinal cord?
Within the cauda equina
Which structure is NOT part of the cauda equina?
Filum terminale
What is the main function of the conus medullaris?
To anchor the spinal cord to the coccyx
In which part of the spinal cord would you find the filum terminale?
Extending from the conus medullaris towards the coccyx
What structure anchors the spinal cord to the dura mater and limits side-to-side movement within the vertebral canal?
Denticulate ligament
Which of the following structures is NOT a part of the cauda equina?
Conus medullaris
What is the primary function of the filum terminale?
Anchoring the spinal cord to the coccyx
Where is the lumbar cistern located within the spinal cord?
Alongside the cauda equina
Which structure helps to stabilize the spinal cord within the vertebral canal by attaching it to the dura mater superiorly and coccyx inferiorly?
Filum terminale
The denticulate ligament is a structure that:
Anchors the spinal cord to the vertebral column and prevents lateral displacement
The lumbar cistern is a space that:
Contains the cerebrospinal fluid that bathes the cauda equina
The cauda equina is:
A bundle of nerve roots that arise from the conus medullaris
The conus medullaris is:
The distal end of the spinal cord, typically at the level of $L1-L2$ vertebrae
The filum terminale is:
A thin, fibrous strand that extends from the conus medullaris to the coccyx
What is the function of the denticulate ligament in the spinal cord?
To tether the spinal cord to the vertebral bodies, preventing excessive movement
What is the lumbar cistern?
The terminal dilation of the subarachnoid space surrounding the cauda equina
What is the cauda equina?
The bundle of spinal nerve roots that arises from the conus medullaris
What is the conus medullaris?
The tapered, conical termination of the spinal cord at the level of L1-L2 vertebrae
What is the function of the filum terminale?
To anchor the conus medullaris to the coccyx
Which structure is responsible for tethering the spinal cord to the vertebral bodies?
Denticulate ligament
Which of the following structures is located at the lower end of the spinal cord?
Lumbar cistern
What is the primary function of the cauda equina?
To transmit nerve signals from the lower spinal cord to the lower extremities
Which structure anchors the conus medullaris to the coccyx, preventing excessive movement?
Filum terminale
What is the relationship between the cauda equina and the lumbar cistern?
The cauda equina is enclosed within the lumbar cistern
Test your knowledge on the anatomy of dorsal and ventral nerves, including dorsal horns, dorsal roots, ventral horns, spinal nerves, and more. Identify key structures and functions related to the nervous system.
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