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USMLE high yield facts
USMLE Q + A from various review books
92
Medical
Professional
07/19/2007

Additional Medical Flashcards

 


 

Cards

Term
what passes through the superior orbital fissure?
Definition
Cranial nerves III, IV, V(i only), VI + sympathetic nerves + ophthalmic veins
Term
what passes through the foramen rotundum?
Definition
CN V2 (maxillary division of trigeminal)
Term
what passes through the foramen ovale?
Definition
Cranial nerve V3 (mandibular branch trigeminal) + accessory meningeal artery
Term
what passes through foramen spinosum?
Definition
middle meningeal artery
Term
what passes through the foramen magnum?
Definition
spinal cord, accesory nerve, vertebral and spinal arteries
Term
what passes through the jugular foramen?
Definition
cranial nerves IX, X, XI, internal jugular vein
Term
what passes through the hypoglossal canal?
Definition
cranial nerve XII
Term
In which direction does the medial rectus move the eye?
Definition
towards the nose
Term
what nerve innervates the medial rectus?
Definition
CN III
Term
what nerve innervates the lateral rectus?
Definition
CN VI (Abducens)
Term
what does the superior rectus do?
Definition
moves eye up and towards nose
Term
what muscle moves the eye up and out?
Definition
inferior oblique
Term
which muscle moves the eye down and towards the nose?
Definition
inferior rectus (III)
Term
what does the superior oblique do?
Definition
move eye down and out (IV)
Term
what does contraction of the ciliary muscle by the parasympathetic nervous system do?
Definition
relaxes the suspensory ligaments which let the lens turn globular or near vision
Term
what are the signs of Horner's syndrome and what causes it?
Definition
miosis, ptosis, anhydrosis
cause by tumor or neck injury that interrupts cervical sympathetic chain
Term
what nerve innervates the tongue muscles?
Definition
hypoglossal (XII)
Term
what does the genioglossus do?
Definition
pulls tongue out
Term
what does the styloglossus do?
Definition
pulls tongue in and up
Term
what does the hyoglossus do?
Definition
pullso tongue down
Term
where does the tongue go when hypoglossal nerve is damaged and why?
Definition
towards side of damage b/c healthy genioglossus pushes tongue that way
Term
what nerve delivers taste sensation to the anterior 2/3 of the tongue?
Definition
VII
Term
what nerve carries touch, temperature sensation from the anterior 2/3 of tongue?
Definition
V3
Term
what nerve carries taste, touch, and temperature from the posterior 1/3 of tongue?
Definition
IX
Term
from which branchial arch are the mandible and muscles of mastication derived?
Definition
1st
Term
which muscles open the mouth?
Definition
lateral pterygoid, digastric, geniohyoid
Term
which muscles close the mouth?
Definition
mostly masseter with help from temporalis and medial pterygoid
Term
which muscle protrudes the mandible?
Definition
lateral pterygoid
Term
which muscle retracts the mandible?
Definition
temporalis
Term
what are the 4 cartilages of the larynx?
Definition
cricoid, thyroid, arytenoids
Term
to which larynx cartilages do the vocal chords attach?
Definition
arytenoid
Term
which muscle opens the glottis?
Definition
posterior cricoarytenoid (recurrent nerve)
Term
which muscle closes the glottis?
Definition
lateral cricarytenoid (recurrent nerve)
Term
which muscle relaxes the vocal chords?
Definition
thyroarytenoid
Term
which muscle tightens the vocal chords?
Definition
cricothyroid (superior laryngeal nerve)
Term
what vessel does the left recurrent nerve wrap around?
Definition
aortic arch
Term
what vessel does the right recurrent nerve wrap around?
Definition
subclavian artery
Term
main muscle responsible for shoulder adduction? + innervation
Definition
-pec major -C5 to T1
Term
main muscles responsible for shoulder abduction and their innervation?
Definition
deltoid then serratus anterior (long thoracic nerve)
Term
main muscle responsible for outward rotation of shoulder?
Definition
infraspinatus (suprascapular nerve)
Term
what muscle is responsible for inward shoulder rotation?
Definition
subscapular (subscapular nerve)
Term
what causes scapular winging?
Definition
paralysis of serratus anterior muscle, due to damage of the long thoracic nerve (ie stab wounds)
Term
what does pain on abduction signify?
Definition
inflammation of subacromial bursa
Term
which spinal rami form the upper trunk of the brachial plexus?
Definition
C5-C6
Term
which spinal rami form the middle trunk of brachial plexus?
Definition
C7
Term
which spinal rami form the lower trunk of the brachial plexus?
Definition
C8-T1
Term
what is the derivation of the musculocutaneous nerve?
Definition
the upper trunk (C5-C6)
Term
what is the derivation of the axillary, radial, and median nerves?
Definition
middle trunk (C7) note: axillary and radial nerve come from the posterior cord
Term
what is the derivation of the ulnar nerve?
Definition
the lower trunk (C8-T1)
Term
what may cause an upper brachial plexus injury and how does it present?
Definition
forceful separation of neck and shoulder ie football, motorcycles. causes the arm to hang medially rotated (waiter's tip hand)
Term
how might a posterior cord injury occur and how does it manifest?
Definition
long crutches may injure the posterior cord, especially the radial nerve. This leads to wrist drop
Term
how might a lower brachial plexus injury occur and manifest?
Definition
forceful delivery leads to ulnar nerve damage, causing "claw hand"
Term
what does radial nerve injury lead to?
Definition
wrist drop, loss of triceps reflex, sensation loss to posterior arm/dorsal hand
Term
what does median nerve damage do?
Definition
inability to flex thumb, index, middle finger, no thumb opposition, thenar atrophy + sensory loss to palm and finger tips of 1st 2 1/2 fingers
Term
what does ulnar nerve damage lead to?
Definition
claw hand, inability to flex 4th/5th finger, apothenar atrophy + sensory loss to palm and tips of ulnar 1 1/2 fingers
Term
what does musculocutaneous nerve damage cause?
Definition
loss of elbow flexion, supination, and bieps reflex + sensation loss to extensor side of forearm
Term
carpal tunnel syndrome
Definition
medial nerve compression leads to pain/tingling
Term
which nerve is at most risk of injury from a humeral fracture?
Definition
the radial nerve
Term
which nerve --> elbow flexion?
Definition
musculocutaneous
Term
which nerve --> elbow extension?
Definition
radial nerve
Term
which nerve and muscle are supinators of the forearm
Definition
biceps and musculocutaneous nerve
Term
which muscle and nerve are responsible for pronation of the forearm?
Definition
pronator teres and median nerve
Term
tell me about tennis elbow
Definition
repetitive stress injury, inflammation of the lateral epicondyle which is the origin of forearm extensor muscles

(note that the actual elbow join is not involved)
Term
main muscle and nerve --> outward hip rotation
Definition
gluteus maximus, inferior gluteal nerve
Term
main muscle/nerve --> inward hip rotation
Definition
gluteus medius/minimus, superior gluteal nerve
Term
main muscle responsible for hip extension
Definition
glut maximus (inferior gluteal nerve)
Term
muscle responsible for hip flexion?
Definition
iliopsoas (femoral nerve)
Term
main muscle responsible for hip abduction?
Definition
gluteus medius (sup gluteal nerve)
Term
main muscle --> hip adduction
Definition
adductor magnus/minimus (obturator nerve)
Term
knee extension (main muscle and nerve)
Definition
quadriceps femoris (femoral nerve)
Term
knee flexion (main muscle/nerve)
Definition
"hamstrings" semimembranous, semitendinous, biceps femoris

sciatic nerve
Term
inward knee rotation (muscle/nerve)
Definition
semimembranous, sciatic nerve
Term
outward knee rotation (muscle/nerve)
Definition
biceps femoris, sciatic nerve
Term
where is the safest place on the glutes to give a shot?
Definition
upper lateral quadrant (avoid sciatic nerve this way)
Term
dorsiflexion and foot inversion (muscle/nerve)
Definition
tibialis anterior, deep peroneal nerve
Term
ankle dorsiflexion and eversion
Definition
peroneus tertius, deep peroneal nerve
Term
plantarflexion and inversion
Definition
peroneus longus/brevus, superficial peroneal nerve
Term
plantarflexion and eversion
Definition
tibialis posterior, tibial nerve
Term
injury to common peroneal nerve
Definition
winds around neck of fibula, MOST COMMONLY INJURED NERVE OF LOWER LIMB, foot drop
Term
injury to tibial nerve
Definition
rare (deep laceration of popliteal fossa), no plantarflexion
Term
what structures lie in the superior mediastinum?
Definition
thymus, great vessels, trachea, esophagus
Term
what structures live in the inferior mediastinum?
Definition
middle:heart, posterior: esoph/aorta, anterior:filed by thymus in infants
Term
what does the left coronary artery supply
Definition
(ant. interventricular and circumflex arteries) left atrium/ventricle + anterior septum
Term
right coronary artery supplies:
Definition
right atrium, right ventricle, sinus node, AV node
Term
branches of celiac trunk
Definition
left gastric, splenic, hepatic, gastroduodenal, superior pancreaticoduodenal
Term
branches of superior mesenteric artery
Definition
inferior pancreaticoduodenal, branches to small intestine, cecum, ascending and transverse colon
Term
branches of inferior mesenteric artery
Definition
branches to descending and sigmoid colon, superior rectal artery
Term
portocaval shunts
Definition
can lead to esophageal varices, hemorrhoids, caput medusae
Term
intraperitoneal organs
Definition
stomach, SI, transverse colon, spleen, part of liver
Term
retroperitoneal organs
Definition
aorta, vena cava, kidneys, pancreas, duodenum, ascending and descending colon
Term
ovarian blood supply
Definition
ovarian artery (from aorta), uterine artery (from internal iliac)
Term
testis blood supply
Definition
testicular artery (from aorta), artery of ductus deferens (from internal iliac), cremasteric artery (from inferior epigastric)
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