Cervical, Brachial and Lumbosacral Plexuses

Question 1

Anatomical Divisions of the Nervous System?

Answer 1

Central NS & Peripheral NS

Question 2

Formed by the anterior rami of the first four cervical nerves?

Answer 2

Cervical Plexus

Question 3

The cervical plexus is covered in front by the ______ of __________ and related to the Internal Jugular vein.

Answer 3

Prevertebral layer

Deep cervical fascia

Question 4

Cutaneous branch:

Lateral part of occipital region and medial surface of the auricle?

Answer 4

Lesser Occipital(C2)

Question 5

Cutaneous branch:

Angle of the mandible, parotid gland and auricle?

Answer 5

Greater Auricular(C2 and C3)

Question 6

Cutaneous branch:

Anterior and lateral surfaces of the neck?

Answer 6

Transverse cutaneous(C2 and C3)

Question 7

Cutaneous branch:

Chest wall, shoulder and upper half on deltoid region

Answer 7

Supraclavicular(C3 and C4)

Question 8

Muscular Branch:

Prevertebral; Sternocleidomastoid (Proprioceptive)

Answer 8

C2 and C3

Question 9

Muscular Branch:

Levator scapulae; Trapezius (Proprioceptive)

Answer 9

C2 and C4–

Question 10

Muscular Branch:

Omohyoid, Sternohyoidand Sternothyroid

Answer 10

Ansa Cervicalis

Question 11

Formed by fibers from union of Hypoglossal and C1 nerves(Descending branch) unites with Descending Cervical (C2 and C3)

Answer 11

Ansa Cervicalis

Question 12

Only motor nerve supply to the Diaphragm and Arises from C3, C4 and C5?

Answer 12

Phrenic Nerve

Question 13

T or F:
Can be injured by penetrating wounds in the neck–paralyzed half of the diaphragm relaxes and is pushed up into the thorax–lower lobe on the affected side will collapse.

Answer 13

T

Question 14

BRACHIAL PLEXUS has

_ ROOTS = _ TRUNKS = _ DIVISIONS = _ CORDS

Answer 14

5 ROOTS = 3 TRUNKS = 6 DIVISIONS = 3 CORDS

Question 15

Branches of Roots?

Answer 15

Dorsal Scapular(C5)
Long Thoracic( C5 –C7)

Question 16

Branches of Upper trunk?

Answer 16

Nerve to Subclavius(C5 and C6)

Suprascapular(C5 and C6)

Question 17

Branches of lateral cord?

Answer 17

Lateral Pectoral (C5 –C7)
Musculocutaneous (C5 –C7)
Lateral root of MEDIAN (C5, C6and C7)

Question 18

Branches of Medial Cord?

Answer 18

Medial Pectoral(C8 –T1)
Medial cutaneous nerve of arm(C8 –T1)
Medial cutaneous nerve of forearm(C8–
T1)
ULNAR(C8 –T1)
Medial root of MEDIAN (C8 andT1)

Question 19

Syndrom where results from lesion of the C5 and C6ventral rami in the superior trunk of the plexus?

Answer 19

Erb –Duchenne’s syndrome

Question 20

Syndrome where the proximal musculature in the upper limb is mainly affected?

Answer 20

Erb –Duchenne’s syndrome

Question 21

Syndrome where the upper limb is held in a “waiter’s tip” position; arm is adducted, extended and medially rotated; forearm is pronated and the carpal flexors flex the hand at the wrist?

Answer 21

Erb –Duchenne’s syndrome

Question 22

Results from compression of the C8 and T1ventral rami in the inferior trunk of the plexus?

Answer 22

Klumpke’s paralysis

Question 23

Altered sensation in the medial hand, ring and little finger and weakness of the intrinsic muscles of hand–combination of an “ape hand” and a “claw hand”?

Answer 23

Klumpke’s paralysis

Question 24

Most commonly injured as it courses superficial to the Serratus anterioron the lateral wall of the thorax?

Answer 24

Long Thoracic nerve lesions

Question 25

Patients cannot hold the vertebral border of the scapula flat against the back and may have a “winging” of the vertebral border

Answer 25

Long Thoracic nerve lesions

Question 26

Injury caused by blowsor surgical injuryin axilla, weight lifting or carrying heavy objecton the shoulder?

Answer 26

LONG THORACICnerve injury–

Question 27

May be injured as a result of a dislocation of the head of the humerusor by a fracture of the surgical neck of the humerus

Answer 27

Axillary nerve lesions

Question 28

Lesion where weakness in flexion of the forearm at the elbowand weakness in supination?

Answer 28

Musculocutaneous nerve lesions

Question 29

Weakness in the ability to extend the hand at the wristand a loss of extensionat the MP joints of all digits?

Answer 29

Wristdrop

Question 30

May experience pain and paresthesia in skin over the first dorsal interosseous muscle between the thumb and index finger

Answer 30

Radial nerve lesions

Question 31

Proximal lesion where supracondylar fracture of the humerus, compression between heads of pronator teres muscle?

Answer 31

Median nerve lesions

Question 32

Index and middle fingers remain extended when attempting to flex in making a fist

Answer 32

Hand of benediction

Question 33

Experience numbness and pain over the palmar aspects of thumb, index and middle fingers?

Answer 33

Median nerve lesions

Question 34

Weakness in opposition of thumb, remains adducted and extended?

Answer 34

Ape hand-

Question 35

Proximal lesion where medial epicondyle fracture of the humerus?

Answer 35

Ulnar nerve lesions

Question 36

Lesion where weakness in flexion of medial fingers, flexion at wrist?

Answer 36

Ulnar nerve lesions

Question 37

Caused by weakness of the medial 2 lumbricals that flex the MP joints and extend the IP joints of the ring and little fingers?

Answer 37

Ulnar nerve lesions

Question 38

Formed within the Psoas majormuscle by the ventral rami of L1 –L4?

Answer 38

Lumbar Plexus

Question 39

Branches from L1; emerges from the lateral border of Psoas and runs in front of Quadratus lumborum?

Answer 39

Iliohypogastric

Question 40

This branch supplies the skin of the lower part of the anterior abdominal wall.

Answer 40

Iliohypogastric

Question 41

Branch from L1; emerges from the lateral borderof Psoas and runs in front of Quadratus lumborum?

Answer 41

Ilioinguinal

Question 42

Passes through the Inguinal canal to supply the skin of the groin and the scrotum / labia majora?

Answer 42

Ilioinguinal

Question 43

Branch from L1 and L2; emerges from the anterior surface of Psoas?

Answer 43

Genitofemoral

Question 44

Branch from L2 and L3;emerges from the lateral border of Psoas, crosses the Iliacus and enters the thigh behind the Inguinal ligament

Answer 44

Lateral Femoral Cutaneous

Question 45

Supplies the skin over the lateral surface of the thigh

Answer 45

Lateral Femoral Cutaneous

Question 46

Largest branch of the | lumbar plexus, from L2,L3,L4; emerges from lateral borderof Psoas?

Answer 46

Femoral Nerve

Question 47

Nerve that supplies the muscles on the anterior thigh and skin on the antero-medial aspect

Answer 47

Femoral Nerve

Question 48

Nerve where lesions may be damaged in the abdomen by an abscess of the Psoas major

Answer 48

Femoral Nerve

Question 49

From L2,L3,L4 Emerges from the medial border of Psoas Supplies the medial thigh muscles and skin on the medial aspect of thigh

Answer 49

Obturator nerve

Question 50

- Most commonly lesioned in the Pelvis - Patients are unable to adduct the thighat the hip - Paresthesia in the skin of the medial thigh

Answer 50

Obturator nerve lesions

Question 51

Lies on the posterior pelvic wall in front of the Piriformis muscle. Formed by the anterior rami of L4 and L5 and S1 –S4.

Answer 51

Sacral Plexus

Question 52

Largest nerve in the body. From L4 –S3. Emerges from the greater sciatic foramen

Answer 52

Sciatic Nerve

Question 53

Susceptible to damage from an IM injection in the lower medial quadrant of the gluteus maximus muscleor it may be compressed as a result of a posterior dislocation of the femur

Answer 53

Sciatic nerve lesions

Question 54

L5 and S1 roots are commonly compressed–pain that radiates into the L5 and S1 dermatomes of the leg and foot

Answer 54

Sciatic nerve lesions

Question 55

``` Results to weakened abductionof the thigh by gluteus medius: -Gluteus medius limp -Gluteal gait -(+) Trendelenburg sign ```

Answer 55

Superior Gluteal nerve injury

Question 56

Nerve Lesions where weakness in the ability to laterally rotate and extend the thigh at hip joint.

Answer 56

Inferior Gluteal nerve lesions

Question 57

Difficulty extending the thigh at the hip from a flexed position, as in climbing stairs or rising from a chair.

Answer 57

Inferior Gluteal nerve lesions

Question 58

Nerve which leaves the main pelvic cavity through greater sciatic foramen and enters perineum through the lesser sciatic foramen

Answer 58

Pudendal nerve

Question 59

The Inferior rectal branch of the Pudendal nerve consists of?

Answer 59

Perianal skin ext. anal sphincter, mucous membrane –lower anal canal

Question 60

The Dorsal nerve of Penis / Clitoris perineal branch of the Pudendal nerve consists of?

Answer 60

Perineal muscles / skin