MUSCULOESKELETAL,SKIN,CONNECTIVE TISSUE Flashcards
What’s the most common injury at the knee In contact sports?
Lateral meniscus injury
What’s the unhappy triad?
LATERAL FORCE CAUSE:
ACL
MCL
Medial meniscus
Most common bone injured in the carpal zone?
Scaphoid
AVASCULAR NECROSIS
What have if there is a dislocation of lunate bone?
Cause carpal tunnel syndrome
What nerve is impaired in lesion of hook of the hamate?
Ulnar nerve damage
What’s the guyon canal sindrome?
Ulnar compression in cyclisits
Explain sites of upper extremity injury and its nerve injury (6)
Axiliary C5-C6Fractured surgical neck of humerus; anterior dislocation of humerus
musculocutaneusC5-C7 Upper trunk compression
radial C5-T1 Midshaft fracture of humerus;“Saturday night palsy”
median C5-T1 Supracondylar fracture of humerus (proximal lesion); carpal tunnel syndrome and wrist laceration (distal lesion)
Ulnar C8-T1 Fracture of medial epicondyle of humerus (proximal lesion); fractured hook of hamate (distal lesion)
Recurrent branch median nerve C5-T1 Superficial laceration of palm
Signs of injuries in brachial plexus (9)
- Erb palsy (“waiter’s tip”) UPPER TRUNK
- Claw hand (Klumpke palsy) LOWER TRUNK
- Wrist drop POSTERIOR CORD
- Winged scapula ROOT long thoracic nerve
- Deltoid paralysis AXILLARY
- “Saturday night palsy” (wrist drop) RADIAL
- Difficulty flexing elbow, variable sensory loss MUSCULOCUTANEUS
- Decreased thumb function, “Pope’s blessing” MEDIAN
- Intrinsic muscles of hand, claw hand ULNAR
Explain sites of lower extremity injury and its nerve injury (6)
Obturador L2-L4 Pelvic surgery
Femoral L2-L4 Pelvic fracture
Common peroneal L4-S2 lateral aspect of leg, fibular neck fracture
Tibial L4-S3 Knee trauma, Baker cyst (proximal lesion); tarsal tunnel syndrome (distal lesion)
Superior Gluteal L4-S1 intramuscular injection to upper medial gluteal region
Inferior Gluteal Posterior L5-S2 hip dislocation
Signs of lumbosacral radiculopathy 3
L3-L4 Weakness of knee extension, patellar reflex
L4-L5 Weakness of dorsiflexion, difficulty in heel-walking
L5-S1 Weakness of plantarflexion, difficulty in toe-walking, Achilles reflex
What nerve is affected in L3-L4 herniation?
L4!!!!!!!
How the sarcomere is divided?
MHAIZ
MHA MIOSINA
IZ ACTINA
What bands shrink ?
HI
What engines are activated in muscle contraction and relaxation?
Myosin-light-chain kinase CONTRACTION
Myosin-light-chain phosphatase RELAXATION
PTH actions depend of levels (2)
LOW INTERMITENT Anabolica
HIGH CONSTAT Catabolic
Gene implicated in achondroplasia ?
Activation of FGFR inhibit Chondrocyte proliferation
Diagnostic and causes of primary osteoporosis (1-4)
DEXA< 2.5
Steroids
Anticonvulsant
Anticoagulant
Thyroid replacement
What’s denosumab?
Antibody against RANKL (active osteoclasts)
Cause and treatment of osteoporosis
Mutation of carbonic anhydrise in osteoclasts
Bone marrow transplant
How pager disease cause heart failure ?
Bone fractures cause arterio-venus shunts
Causes of avascular necrosis of femur head ASEPTIC
Alcoholism Sickle cell disease Exogenous/ Endogenous corticosteroids Pancreatitis Trauma Idiopathic (Legg-Calvé-Perthes disease) Caisson
Difference between primary and secondary hyperparathyroidism Ca serum, PO4,ALP
primary ⬆️Ca serum ⬇️PO4 ⬆️ALP
secondary ⬇️Ca serum ⬆️PO4 ⬆️ALP
Age and principal characteristics of benign bone tumors
GIANT CELL 20-40 yrs
around knee. “Soap bubble”
OSTEOCHONDROMA Males < 25 years old.
Un cachito epifisis
Age and principal characteristics of malign bone tumors
OSTEOSARCOMA 10-20yrs >65
Around the knee metaphysis
Codman triangle elevation of periosteum
EWING SARCOMA
Boys<15 yrs diaphysis scapula pelvis ribs
Onion skin periosteum reaction
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