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PAS- ANATOMY > CHAPTER 41 > Flashcards

CHAPTER 41 Flashcards

1
Q

definition

  • the _____ is a network of intermingling and intertwining nerves that supply structures of the upper limb
    1. from latin plexus = twining or braid
A

brachial plexus

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2
Q

formation of the brachial plexus

  • spinal nerve plexuses are derived only from the _____ and never from the dorsal rami
  • the brachial plexus is formed directly from the ventral rami of spinal nerves _____, _____, _____, _____, and _____
  • these ventral rami combine to form the _____ of the brachial plexus
  • -the ventral rami of _____ and _____ join to form the _____
  • -the ventral ramus of _____ continues as the _____
  • -the ventral rami of _____ and _____ join to form the _____
  • trunks are found in the _____
A 
ventral rami
C5
C6
C7
C8
T1
trunks
C5
C6
upper trunk
C7
middle trunk
C8
T1
lower trunk
neck
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3
Q

nerves derived from the brachial plexus
general overview
-each trunk of the brachial plexus divides into an _____ and a _____
–the anterior divisions of the upper and middle trunks join to form the _____
–the anterior division of the lower trunk continues as the _____
–the three posterior divisions of the upper, middle, and lower trunks all join to form the _____
-cords are all found in the _____
-the names lateral, posterior, and medial indicate their location in relation to the _____
-the cords give off a total of _____ nerves and then continue _____ as the _____ major nerves of the upper limb

A 
anterior division
posterior division
lateral cord
medial cord
posterior cord
axillary artery
8
distally
4
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4
Q

branches of the ventral rami

  • _____
  • _____
A

dorsal scapular nerve

long thoracic nerve

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5
Q

branches of the trunks

  • _____
  • _____
A

nerve to the subclavius

suprascapular nerve

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6
Q

branches of the cords

  • _____
  • _____
  • _____
  • _____
  • _____
  • _____
  • _____
  • _____
A 
lateral pectoral nerve
medial pectoral nerve 
medial brachial cutaneous nerve 
medial antebrachial cutaneous nerve 
upper subscapular nerve 
thoracodorsal nerve 
lower subscapular nerve 
axillary nerve
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7
Q

nerves derived from cords (primary nerves)

  • _____
  • _____
  • _____
  • _____
A

musculocutaneous nerve
ulnar nerve
radial nerve
median nerve

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8
Q

patterns of brachial plexus nerves
branches of the ventral rami
-dorsal scapular nerve
–the dorsal scapular nerve originates from the ventral ramus of _____
–it courses deep to _____ and enters the deep surface of the _____, supplying _____ and _____ muscles

  • long thoracic nerve
  • -the long thoracic nerve originates from the ventral rami of _____, _____, and _____
  • -it courses posterior to the _____ and courses on the _____ surface of the _____ muscle, which it supplies
A 
C5
levator scapula 
rhomboids 
rhomboid major
rhomboid minor 
C5
C6
C7
axillary artery 
external 
serratus anterior
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9
Q

patterns of the brachial plexus nerves
branches of the trunks
-nerve to the subclavius
–the nerve to the subclavius originates from the _____
–it descends _____ to the _____, ending in and supplying the _____

  • suprascapular nerve
  • -the suprascapular nerve originates from the _____
  • -coursing _____ and _____, this nerve passes through the _____ and enters the _____, innervating the _____
  • -it then courses around the spine of the _____ and enters the _____, innervating the _____
A 
upper trunk
posterior 
clavicle
subclavius muscle 
upper trunk
laterally 
posteriorly
suprascapular notch
supraspinous fossa 
supraspinatus muscle
scapula
infraspinous fossa
infraspinatus muscle
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10
Q

patterns of the brachial plexus nerves
branches of the cords
-lateral pectoral nerve
–the lateral pectoral nerve originates from the _____
–it courses through the _____ above _____ into the deep surface of the _____, which it supplies

A

lateral cord
fascia
pectoralis minor
pectoralis major

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11
Q

branches of the cords

  • medial pectoral nerve
  • -the medial pectoral nerve originates from the _____
  • -it pierces the _____ and passes through to the deep surface of _____, supplying both muscles
A

medial cord
pectoralis minor muscle
pectoralis major

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12
Q

branches of the cords

  • medial brachial cutaneous nerve
  • -the medial branch cutaneous nerve originates from the _____
  • -it pierces the _____ of the _____ arm and supplies the _____ on the lower _____ arm
A 
medial cord
fascia
proximal
skin
medial
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13
Q

branches of the cords

  • medial antebrachial cutaneous nerve
  • -the medial antebrachial cutaneous nerve originates from the _____
  • -it descends below the middle of the _____, where it pierces the _____ and supplies the _____ on the _____ forearm
A 
medial cord
forearm
antebrachial fascia
skin
medial
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14
Q

branches of the cords

  • upper subscapular nerve
  • -the upper subscapular nerve originates from the _____
  • -it courses into and supplies the _____
A

posterior cord

subscapularis muscle

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15
Q

branches of the cords

  • thoracodorsal nerve
  • -the thoracodorsal nerve originates from the _____
  • -it courses _____ and _____ to the deep surface of the _____, which it innervates
A

posterior cord
inferiorly
posteriorly
latissimus dorsi muscle

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16
Q

branches of the cords

  • lower subscapular nerve
  • -the lower subscapular nerve originates from the _____
  • -it courses over the _____ surface of the _____ and divides into two muscular branches, one supplying the _____ and the other supplying the _____
A 
posterior cord
anterior 
subscapularis muscle 
subscapularis muscle
teres major muscle
17
Q

branches of the cords

  • axillary nerve
  • -the axillary nerve originates from the _____
  • -it courses _____ through the _____ of the shoulder, passes _____ to the surgical neck of the _____, and innervates the _____ and _____ muscles
A 
posterior cord
inferiorly 
quadrangular space
medial
humerus 
teres minor 
deltoid
18
Q

nerves derived from cords (_____ nerves)

  • the _____ is the continuation of the lateral cord of the brachial plexus, beginning after the _____ to the _____ is given off
  • the _____ is the continuation of the medial cord of the brachial plexus, beginning after the _____ to the _____ is given off
  • the _____ is the continuation of the _____ of the brachial plexus, beginning after the _____ is given off
  • the _____ is derived from the _____ root of the _____ and the _____ root of the _____
A 
primary 
musculocutaneous nerve 
lateral root
median nerve
ulnar nerve 
meidal root
median nerve 
radial nerve 
posterior cord
axillary nerve 
median nerve 
lateral 
median nerve
meidal 
median nerve

PAS- ANATOMY (38 decks)

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