Anatomy Flashcards
Optimal Site for Femoral Nerve Block
-inguinal crease lateral to the femoral artery (targets femoral nerve)
Actions of Peroneal Nerves
- superficial n: eversion and innervation of the anterolateral leg and dorsum of foot
- deep n: dorsiflexion
What is the function of a T tubule in a muscle?
-T tubules transmit depolarization from the sarcolema to the sarcoplasmic reticulum in rapid, uniform manner during muscle contraction
Horizontal transition of rectus abdominus (ie. transverse C section) risks damage to which arteries?
-inferior epigastric arteries enter the rectus abdominus at the level of the arcuate line
Location of CSF in Skull
-under arachnoid mater and above pia mater
Where the radial nerve can be injured?
- supinator canal: when using screw driver
- axilla: crutch palsy
- midshaft humerus
What nerve roots innervate the diaphragm?
-C3, C4, C5
What structures are involved in external rotation of shoulder?
- teres minor muscle
- infraspinatous tendon
- both are innervated by the suprascapular nerve
What is the omental bursa (lesser sac)?
-the space behind the stomach but in front of the retroperitoneal structures
Serratus Anterior Muscle
- when damaged causes winging of scapula
- innervated by long thoracic nerve
Where to do thoracentesis
- Midclavicular: 6th-8th rib
- Midaxillary: 8th- 10th rib
- Paravertebral: 10th-12th rib
- always insert above a rib to avoid nerve damage
- gen rule to go two ribs below start of dullness
Artery that runs with the radial nerve at the midshaft humerus?
- deep brachial artery
- may be damaged with radial nerve
Muscles of the Rotator Cuff
- supraspinatus (abduction)
- infraspinatus (external rotation)
- teres minor (adduction and external rotation)
- subscapularis (adduction and external rotation)
- SITS
Most Common Location of Anal Fissure?
-posterior midline distal to dentate line
Thoracic Outlet Syndome
- compression of lower trunk of brachial plexus in scalene triangle of neck
- upper extremity numbness, tingling and weakness worse with overhead movement or pitching
- inc. risk with extra cervical rib
Where to give butt injection?
- superlateral quadrant
- if give superomedial may cause contralateral hip drop w/ damage to sup. gluteal nerve
Bones of Wrist
- Some Lovers Try Positions That They Cannot Handle
- palm faces away from you and it goes proximal thumb to pinkie then distal thumb to pinkie
- scaphoid
- lunate
- triquetrum
- pisiform
- trapezium
- trapezoid
- capitate
- hamate
What muscle does arm abduction above 90 degrees?
- trapezius
- damage may cause shoulder droop
- innervated by spinal accessory nerve
Signs/Risks of Scaphoid Fracture
- snuff box pain after fall onto outstretched hand
- risk of avascular necrosis
What structures pass under the sup. mesentaric artery at it’s bifurcation with the aorta?
- left renal vein
- transverse duodenum (may be occluded with rapid weight loss)
What nerve innervates sensation over the suprapubic area and motor to the anterolateral abdominal wall muscles?
- iliohypogastric nerve
- may be damaged with abdominal surgery like an appendectomy
S2, S3, S4 innervate?
- pelvic floor muscles
- S2-S4 keep the pee pee off the floor
Annular Pancreas
-head of pancreas wraps around descending portion of duodenum
