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22 Cards in this Set
- Front
- Back
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A) Brachial plexus is part of what nervous system B) What does it innervate |
A) Peripheral Nervous System B) Upper extremity |
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A) Motor impulses B) Sensory impulses |
A) (Goes down)Brain (CNS)- (Exits) spinal cord via anterior horn (CNS)- Periphery via nerves (PNS) B) (Goes up) Periphery via nerves (PNS)-(Enters) spinal cord via the posterior/dorsal horn (CNS)- Brain (CNS) |
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What forms the brachial plexus |
The anterior rami (branches) of spinal nerves C5 through T1 |
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A) What forms a spinal nerve B) Where is a spinal nerve located |
A) Formed by the union of the anterior (ventral) and posterior (Dorsal) roots of the spinal nerves B) A PNS structure that is located just outside the intervertebral foramen |
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A) Where are motor fibers B) They carry what C) Where are they located |
A) Anterior roots B) signals for the muscle to contract C) Anterior white mater of the spinal cord |
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A) Where are sensory fibers B) Where do they originate at C) What do they carry |
A) Posterior roots B) sensory receptors in skin,joints, etc C) information for the receptors to the posterior white matter in the spinal cord |
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Motor fibers ___ from motor neurons in one level of the spinal cord while the sensory fibers ___ the same segment of the spinal cord |
Arise, enter |
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A) How many pairs of spinal nerves B) Cervical C) Thoracic D) Lumbar E) Sacral F) Coccygeal |
A) 31 B) 8 C) 12 D) 5 E) 5 F) 1 |
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A) Where do C1-C7 spinal nerves exit B) Where does C8 exit C) Where does T1 and down exit |
A) Over the vertebrae B) Over T1 C) Under the vertebrae |
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A) Once the spinal nerve passes through the intervertebral foramen, it does what almost immediately |
A) divides into a posterior and anterior branch (ramus) |
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A) Cervical plexus is what spinal nerves and innervates what B) The brachial plexus is what nerves and innervates what C) Lumbosacral plexus is what nerves and innervates what |
A) C1-C4, neck muscles and diaphragm B) C5-T1, UE muscles C) L1-S3, LE muscles |
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A) What are the trunks B) What are the divisions C) What are the cords D) What are the 5 peripheral nerves |
A) Superior, Middle, Inferior B) Anterior, Posterior of each trunk C) Medial, Lateral, Posterior D) Musculocutaneous, Axillary, Radial, Median, Ulnar |
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Significance of peripheral nerves containing motor and sensory fibers from more than one spinal nerve |
- Provides muscles and skin with innervation from more than one level - If trauma or diseases, perhaps not all levels of innervation will be involved - muscle may be weakened but not completely paralyzed |
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Axillary Nerve |
- C5,C6 - Innervates deltoid and teres minor - Sensory of lateral arm over lower portion of deltoid -Loss of shoulder abduction, weak shoulder external rotation |
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Musculocutaneous Nerve |
-C5-C7 - Innervates coracobrachialis, biceps brachii, brachialis - Sensory of anteorlateral forearm - Loss of elbow flexion when supinated, weak supination |
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Radial Nerve |
-C5,C6,C7,C8,T1 - Innervates elbow extensors, brachioradialis, supinator, wrist, finger, and thumb extensors - Sensory of posterior arm, posterior forearm, and radial side of posterior hand - Loss of elbow, wrist, finger, and thumb extension, "wrist drop" |
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A) Elbow extensors B) Wrist extensors C) Finger extensors D) thumb extensors ( Snuffbox) |
A)Triceps, anconeus B) Extensor carpi radialis longus/brevis, Extensor carpi ulnaris C) Extensor digitorum,indicis, digiti minimi D) Extensor pollicis longus/brevis, Abductor pollicis longus |
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Median Nerve |
- C5,C6,C7,C8,T1 - Innervates pronators, wrist and finger flexors (radial side), most thumb muscles - Sensory of palmar aspect of 1st,2nd,3rd and radial half of 4th fingers -Loss of forearm pronation, thumb opposition,flexion, and abduction "ape hand" |
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A) Pronators B) Wrist flexors C) Finger flexors D) Thumb |
A) Pronator teres/quadratus B) Flexor carpi radialis, palmaris longus C) Flexors digitorum superficialis/ profundus (radial 2 fingers), Flexor pollicis longus D) Flexor pollicis brevis, abductor pollicis brevis, opponens pollicis E) 1st and 2nd lumbricals |
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Ulnar Nerve |
-C8, T1 - Innervates flexor carpi ulnaris, flexor digitorum profundus (medial half), Interossei, 3rd and 4th lumbricales, FAO minimi - Sensory of 4th finger (medial portion) and 5th finger - Loss of wrist ulnar deviation, thumb adduction, most instrinsics, weak wrist, finger flexion (especially 4 and 5) |
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A) How are PNS injured B) What are the first to appear sensory wise B) Motor signs C) What occur first sensory or motor |
A) Stretched beyond normal limits, compressed, become ischemic, direct trauma B) Parathesias (Numbnes and tingling), pain C) Weakness D) Sensory |
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A)Dermatomes B) Myotomes |
A)Area of skin sensation that is served by one spinal nerve B) Group of muscles inervated by one spinal nerve |
