Intro lecture
there is maximum overlap between actin and myosin
active insufficiency
You notice visual or palpable muscle contraction but no movement
trace (1)
insertion of FDS
middle phalynx of 2-5
median n
7,8,1
before testing glut max, this muscle should be checked
erector spinae
Your patient can hold against gravity, but does not have full ROM against gravity. You should...
place them in gavity reduced position
force/velocity relationship in a concentric contraction
increased velocity -> decreased force
Can hold position against gravity; full ROM
fair (3)
action of the lumbricals
flex the MCP and extend the IP's
Median 1,2
ulnar 3,4
These three muscles insert at pes anserine
sartorius, gracilis, semitendinosus
Injury at the medial cord of the brachial plexus, this nerve is going to be MOST affected
Ulnar n.
Henemann's size principle
Can hold against pressure less than 2 pounds
Fair + (3+)
test for infraspinatus
prone, abducted shoulder, externally rotated, elbow flexed to 90, isometric contraction (break). Pressure into IR
suprascapular 5,6
TFL innervation
superior gluteal (L4, 5, S1)
Your patient has a disc collapse between C5 and C6. This muscle would be the MOST affected
supinator
4 components of the neuromuscular system
contractile elements (actin/myosin), tendon and periosteum, myoneural junction, nerve root and LMN
able to move through part of the ROM in gravity reduced position
poor minus (2-)
index, ring, and little finger
test for gluteus medius
side-lying, abducted, slight extension, and slight ER. apply pressure near ankle in adductiona nd slight flexion.
superior gluteal n.
very IMPORTANT muscle
There is a lesion in the posterior division of the upper trunk; there are two muscles that would be the MOST affected
deltoid and teres minor
second strongest force production in regard to type of conrtaction and speed of contraction
slow eccentric
Can move through part of ROM in gravity-dependent. Full ROM in gravity-reduced. Hold against some pressure in the gravity-reduced position.
poor plus (2+)
brachial plexus pathway for ECRB
C7 root -> middle trunk -> posterior division
C6 root -> upper trunk -> posterior division
-> posterior cord -> radial n. -> PIN
test for biceps femoris
prone, knee flexed slightly less than 90, ER of hip, ER of knee. Pressure at ankle into knee extension.
sciatic; long head (tibial), short head (peroneal)
Your patient presents with a history of paresthesia along the little finger side of the hand and into the finger. You wish to check a muscle in the hand to check the integrity of the nerve that supplies cutaneous sensation to this area. You are going to test the strength of...
adductor pollicis