101 ex 14 crossword puzzle nerve plexus

101 ex 14 crossword puzzle nerve plexus

Across

2.This is the most caudal region of the spinal cord (do not use spaces)

7.Indentation of the spinal cord located in the front atthe midline (do not use spaces)

9.Fibers which cross from one side of the brain orspinal cord to the opposite side are __ fibers.

11.The dorsal root contains this type of nerve fibers

12.Motor neurons leave the spinal cord through this structure (do not use spaces)

13.This important nerve of the cervical plexus suppliesthe diaphragm

14.This structure contains dorsal and ventral rootletsand roots of the spinal cord exiting the vertebralcolumn between L2 and S1 (do not use spaces)

15.This is a hole in the center of the spinal cord, linedwith ependymal cells and contains CSF (do not usespaces)

Down

1.The third cranial nerve is

3.This structure is distal to the spinal nerve andcontains both motor and sensory nerve fibers

4.The sciatic nerve comes from this nerve plexus

5.The anterior portion of the grey matter of the spinalcord (do not use spaces)

6.Group of spinal nerve rami which come together to form the nerves which go down the upper extremity. Nerves include the ulnar nerve (do notuse spaces)

8.This type of tract carries efferent information fromthe brain, down the cord, to terminate on a lowermotor neuron

10.Three columns of white matter run up and down the spinal cord. Each column is called a

The correct answer and explanation is :

Answers to the crossword puzzle:

Across:

2. Conusmedullaris
3. Anteriormedianfissure
4. Decussating
5. Sensory
6. Ventralroot
7. Phrenic
8. Caudaequina
9. Centralcanal

Down:

1. Oculomotor
2. Plexus
3. Lumbosacral
4. Ventralhorn
5. Brachialplexus
6. Corticospinal
7. Funiculus

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300-Word Explanation:

The spinal cord is a vital structure that serves as the primary communication pathway between the brain and the body. Understanding the anatomy of the spinal cord and its associated structures is crucial in neurology.

1. Conus medullaris (Across, 2): This refers to the tapered, cone-shaped end of the spinal cord, located around the L1-L2 vertebral levels. Below this, the nerve roots form the cauda equina.
2. Anterior median fissure (Across, 7): This is a deep groove located along the front (ventral) surface of the spinal cord. It runs the length of the cord and divides the left and right halves of the spinal cord.
3. Decussating fibers (Across, 9): Decussation refers to the crossing of nerve fibers from one side of the spinal cord or brain to the opposite side. This is important in processes like sensory and motor control, where the left side of the brain controls the right side of the body and vice versa.
4. Sensory fibers (Across, 11): The dorsal root of the spinal nerve contains sensory fibers that transmit information from sensory receptors (like touch, temperature, and pain) to the spinal cord and brain.
5. Ventral root (Across, 12): This contains motor neurons that carry information from the spinal cord to the muscles and glands.
6. Phrenic nerve (Across, 13): This nerve, originating from the cervical plexus, is critical for breathing as it innervates the diaphragm.
7. Cauda equina (Across, 14): A bundle of nerve roots extending from the end of the spinal cord, it resembles a horse’s tail, and provides motor and sensory function to the lower limbs and pelvic organs.
8. Central canal (Across, 15): The small, fluid-filled channel within the center of the spinal cord, lined with ependymal cells, and filled with cerebrospinal fluid (CSF).

By examining these components, we can understand how the spinal cord, with its complex nerve fibers and structures, plays a vital role in the functioning of the nervous system.