Key Terms Matching A. meningeal layer rich in collagen fibers B. innervates the

Question

Key Terms Matching A. meningeal layer rich in collagen fibers B. innervates the neck region C. axons of sensory neurons coming into spinal cord D. region of spinal cord supplying brachial plexus E. location of motor nuclei to skeletal muscles F. innervates anterior thigh muscles G. cone-shaped tip of spinal cord H. innervates wrist and hand muscles L connected to pia mater by web-like filaments J. collection of cell bodies outside CNS K. anchors spinal cord to coccyx L. innervates pectoral girdle and upper extremity M. contains CSF N. axons of motor neurons exiting spinal cord o. collections of cell bodies within CNS P bundle of myelinated axons totally within CNS Q region of spinal cord supplying lumbar plexus R. a complex network of nerve fibers S. location of sensory nuclei T. innervates posterior thigh muscles U. spinal nerves extending down from conus medullaris V. innervates pelvic girdle and lower extremity W. contains adipose tissue and blood vessels x. innervates the diaphragm Y. fused to surface of spinal cord 1. cervical enlargement 2 ulnar nerve -3. dura mater 4. tract -5, nuclei _6. brachial plexus 7. lumbar enlargement -8. phrenic nerve 9. epidural space -10. sciatic nerve -1 1 ventral gray horn 12, conus medullaris 13. cervical plexus 14. pia mater 15. femoral nerve 16. dorsal root 17. cauda equina 18. lumbar plexus 19. arachnoid mater 20. ventral root 21. subarachnoid space -22. plexus 23. filum terminale _24. ganglia 25. dorsal gray horn

Explanation / Answer

1. cervical enlargement is the area in the spinal cord. it contains the nerves from C5 - T1. It supplies the upper limb.

therefore, cervical enlargement is(D) region of spinal cord supplying the brachial plexus

lumbar enlargement corresponds to cervical enlargement and supplies lumbar plexus

2. Ulna nerve -

Branches
(i) Muscular, to the flexor carpi ulnaris and the
medial half of the flexor digitorum profundus.
(ii) Palmar and dorsal cutaneous branches. The
palmar cutaneous nerve arises in the middle of
the forearm and supplies the skin over the
hypothenar eminence.
The dorsal branch arises 7.5 cm above the
wrist, winds backwards and supplies the
proximal part of the ulnar, fingers and the
adjoining area of the dorsum of the hand.
(iii) Articular branches are given off to the elbow
joint.
CLINICAL ANATOMY
1.The ulnar nerve is also known as the 'musician's
nerve' because it controls fine movements of the
fingers.
2.The ulnar nerve is commonly injured at the
elbow, behind the medial epicondyle; and at the
wrist in front of the flexor retinaculum. When the
nerve is injured a t the elbowthe flexor carpi
ulnaris and the medial half of the flexor digitorum
profundus are paralyzed. Due to this paralysis the
medial border of the forearm becomes flattened.
An attempt to produce flexion at the wrist result in
abduction of the hand. The tendon of the flexor
carpi ulnaris does not tighten on making a fist.
Flexion of the terminal phalanges of the ring and
little fingers is lost. Effects of paralysis on the
hand is called claw hand

therefore ulnar nerve (H) supplies the wrist and hand muscles

3. Dura mater

At places, the meningeal layer of dura mater is folded
on itself to form partitions which divide the cranial
cavity into compartments which lodge different parts
of the brain. The folds are the :
A. Falx cerebri B. Tentorium cerebelli
C Falx cerebelli D. Diaphragma sellae

THe dura mater is (A) meningeal layer rich in collagen fibre

4. Tract

A collection of nerve fibres that connects two masses
of grey matter within the central nervous system is
called a tract. Tracts may be ascending or descending.

therefore tract is(P) bundle of myelinated axon within CNS

Related Questions

Navigate

• Browse (All)
• Browse K
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.