Clinical Applications of the thoracic Limb Flashcards Preview

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Flashcards in Clinical Applications of the thoracic Limb Deck (14)
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Brachial plexus avulsion

-avulsion (pulling/tearing), traction or abduction
-complete or incomplete
-cranial or caudal


Crainial TBPI (traumatic brachial plexus injury)

-difficulty advancing limb at the shoulder (extending shoulder)(suprascapular n.)
-Should instability (suprascapular, subscapular n.)
-Weak elbow flexion (musculocutaneous n.)
-Sensory deficits (musculocutaneous


Caudal TBPI

-inability to bear weight (radial n.)
-loss of carpal and digit extension (knuckling) (radial n.)
-Loss of panniculus reflex (lateral thoracic n.)
-Sensory deficits (radial, median, ulnar n.)


Complete TBPI

-both cranial and caudal. Signs associated with each TBPI seen


Horner's syndrome

-sympathetic denervation
-preganglionic- neck trauma or disc rupture, brachial plexus avulsion (caudal), axillary lesion, cranial thoracic dz, neck tumor, traumatic venipuncture


Brachial Plexus Block

-sensory and motor function of the forelimb
-regional analgesia to the shoulder and distally
-amputations, fracture repair, any deep invasive surgery of the forelimb


Lateral thoracic nerve

-use to test the panniculus reflex
-innervates the cutaneous trunci m.


Suprascapular nerve

innervates the lateral stabilizers of the shoulder (infraspinatus and supraspinatus m.)


Axillary n.

-motor and sensory
-loss of sensation to the lateral aspect of the brachium and caudal scapular region (caudal circumflex humeral a.)
-motor to the flexors od the shoulder
-decreased shoulder stability


Musculocutaneous n.

-motor and sensory
-there will be little change in gate, but you will see a slight straightening of the elbow
-difficulty flexing the elbow
-loss of sensory on the medial aspect of the forearm


Median n. and Ulnar n.

-dropped carpus
-loss of flexion of carpus
-sinking of carpus and fetlock
-loss of autonomous innervation to the palmar aspect of the paw with the loss of both the median, ulnar and the communicating br. of the musculocutaneous n.
-loss of cutaneous sensation to the lateral aspect of the paw and fifth digit


Radial n.

-can bear weight but knucked over
-motor and sensory
-proximal- loss of ability to extend the elbow, carpus and digits (happens at brachial plexus)
-TBPI, trauma, calving, post-anesthetic recovery (horses)
-loss of cutaneous senstation on the dorsal and lateral aspect of the antebrachium and paw


RUMM block

-selective blocking of the radial, ulnar, median and musculocutaneous n.
-procedures on the elbow and distal (distal radius, ulna, carpus, digits)
-Radial n.- proximal to the lateral epicondyle of the humerus
-Ulnar, median and musculocutaneous n.- proximal to the medial epicondyle of the humerus
-medial & lateral side of forelimb


Ring Block

-local anesthesia for distal limb procedures
-onychectomy (declaw)
-radial, ulnar, median, superficial br. of radial n.