msk cram Flashcards

1
Q

what released from sarcolemma

A

na+

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2
Q

what released from sarcoplasmic reticulum

A

ca+

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3
Q

when is ATP released in contraction

A
  • atp hydrolyzed to adp and pi to cause energy for cocking position and pi released, initiating power stroke
  • adp released after power stroke
  • another atp binds to myosin to unbind myosin and actin so myosin can attach to another actin binding site
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4
Q

tropomodulin

A

caps on minus end of actin (near m line)

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5
Q

cap z

A

caps on plus end of actin - attaches to z line

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6
Q

difference between slow (type 1) and fast (type 2) twitch muscle fibres

(4ish)

A
  • slow fibres aerobic (oxidative phosphorylation) , fast fibres anaerobic (glycotic)
  • slow are more metabolically economical, 38 xATP compared to 2xATP +lactic acid from fast fibres
  • fast fibres fatiguable – lactic acid lowers sarcoplasm pH so muscles work less well
  • fast fibres contain fewer mitochondria and higher glycogen stores

type 2= 2a (mix of both types) and 2b (just glycolysis type)

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7
Q

thyroid gland releases calcatonin, effect on calcium

A

less resorption, lower ca2+ (opposite to PTH)

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8
Q

fgf 23

  • from
  • release caused by
  • effect
A

osteocytes

phosphate, PTH

less active vit D, less kidney reabsorption – so less phosphate

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9
Q

trapezius
innervated by
action

A

Accessory (cn11)

elevate, depress, adduct scapula

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10
Q

deltoid
innervated by
action

A

axillary

arm abduction 15-90 degrees

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11
Q

subscapularis
innervated by
action

A

axillary

medially rotates arm

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12
Q

biceps brachii
innervation
action

A

elbow flex
forearm suppination
musculocutaneous

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13
Q

triceps brachii
innervation
action

A

radial

elbow extension

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14
Q

brachialis
innervation
action

A
elbow flex (main)
musculocutaneous
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15
Q

coracobrachialis (superior, proximal)
innervation
action

A

flex shoulder

musculocutaneous

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16
Q

pronator teres and pronator quadratus

  • innervation
  • how to spot them
A
  • quadratus is like a anterior wristband
    teres crosses upper forearm medial elbow to lateral (radius)
    -median nerve
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17
Q

flexor carpi radialis and ulnaris

  • action
  • innervation
A

carpi= wrist so flexes wrist, and abduct/adduct depending on which side

  • radialis= median
  • ulnaris = ulnar nerve
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18
Q

palmaris longus

  • action
  • attaches to
  • inntercation
A
  • flex wrist
  • palmar faschia
  • median
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19
Q
  • flexor digitorum superficialis vs profundis

- innervation- (Excpet)

A
  • superficialis goes to middle phalanges and profundis goes to distal phalynx
  • all median except4/5 profundis fingers, which are ulnar
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20
Q

carpal bones

thumb-pinky, two rows

A

scaphoid
luneate
triquetrium
pisiform

trapzius
trapezoid
capitate
hamate

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21
Q

opponenes pollicus

  • action
  • innevation
A
  • opposes thumb- makes it point to pinky

- median

22
Q

all pollicus innervation=

except=

A

median
abductor pollicis brevis= ulnar
abductor pollicis longis = radial (posterior forearm)
extensor pollicis longis and brevis = radial (post forearm)

23
Q

interosseri

  • action
  • innervation
A
  • palmar ones (x3, no middle finger) - adduct, dorsal onees (x4 - no pinky- this is abductor digiti minimi)- abduct (PADOUT)
  • ulnar
24
Q

lumbricals

  • where
  • action
  • innervation
A
  • attach from flexor profundis tendon to extensor tendon
  • they flex metacarpo join and straighten finger (interphalangeal joints)
  • medial 2= ulnar
    lateral 2= median
25
all extensor muscles innervation =
radial | posterior forarm is all radial
26
opponens digit minimi - action - innervation
- opposes little finger- faces thumb | - ulnar
27
in thenar eminence=
base of thumb: - abductor pollicis brevis, - flexor pollicis brevis - opponens pollicis - adductor pollicis
28
in hypothenar eminence
base of pinky: - abductor digit minimi - flexor digiti minimi - opponens digiti minimi
29
rotator cuff muscles and attachments
``` muscles= SITS supraspinatus infraspinatus terres minor subscapularis ``` ``` attachments = SPILT superior greater tubercle posterior greater tubercle inferior greater rubercle lesser tubercle ```
30
brachioradialis where action innervation
elbow flex radial posterior component of forearm, lateral
31
supinator innervation where
radial | posterior component of forearm, lateral, just below elbow of course
32
abductor pollicus longus - where - innervation
in posterior arm (not hand like the brevis) | radial
33
hand blood supply and drainage
ulnar --(lateral to pisiform)--> superficial arch radial --(snuff box)--> deep arch drainage= back of hand
34
hand muscles nerve
LLOAF = median - lateral lumbricals - oponens pollicis - adductor pollicis - flexor pollicus brevis others =ulnar
35
which nerve runs through carpals tunnel
median nerve
36
anterior compartment of thigh - innervation - blood supply - large muscle group - other muscles
femoral nerve femoral artery quads (vastus lateralis, intermedius, medialis and rectus femoris) sartorius, iliopsoas
37
iliopsoas action
hip flex
38
sartorius action where
hip flex and abduct flex knee anterioir superioiriliac spine (lateral) to tibia (medial), divides anterior and medial compartments of thigh
39
rectus femoris action
part of quads flexs hip extends knee
40
vastus lateralis, medialis, intermedius action
part of quads | extends knee
41
medial compatment - muscles - innervation - hiatus?
adductor muscles x4 - longis, brevis (deep to longis) , magnus (deep to longis and brevis), gracillus - motor= obturator - sensory= obturator for lower 2/3. genitofemoral for upper 1/3 - adductor hiatus is within adductor magnus (v shaped defect due to 2 insertions)
42
quadriceps where
anterior compartment all insert to common tendon rectus femorus comes from two bit of pelvis (is bipenate) vastus x3 originate from femur
43
muscles in gluteal region innervation action
gluteal maximus, medius and minimus maximus= inferior gluteal nerve, extends thigh medius and minimus= superior gluteal nerve, abducts and medially rotates thigh
44
posterior compartment of the thigh - muscles - artery - action - innervation
biceps femoris- knee flex semitendinosus- knee flex, hip extention semembranosus - knee flex, hip extension (lies under semitendonosus but is visible because it is broader) sciatic nerve inferior gluteal artery
45
leg (lower bit of lower limb) 3 compartments= artery= nerve=
anterior (ATDeeP) - (anterior) tibial artery - deep peroneal nerve lateral (LP SuperP - peroneal artery - superficaial peroneal nerve posterior (PTitieTitie) - (posterior) tibial artery - tibial nerve all nerves (tibial and peroneal are branches of the sciatic)
46
another word for peroneal artery
femoral
47
plantarflexion vs dorsiflexion
``` ballet foot= plantarflexion foot like after cramp = dorsiflexion ```
48
anterior and lateral leg compartments : muscles and their action and innervation (4(/5) groups)
ANTERIOR ---deep peroneal nerve toe extnesors= extned toes and dorsiflex feet tibialis anterior= dorsiflex and inverts foot fibularis tertius= dorsiflex and everts foot LATERAL ----superficial peroneal nerve fibularis longus and brevis = plantiflex foot and foot eversion,
49
posterior leg: muscles and their action and their innervation - innervation - superficial (3) - deep (mneumonic) - also
all inervated by tibial nerve superficial= soleus and gastronemius: plantarflex foot. soleus us under gastronemius (plantaris is between and is thin- also plantarflexes ankle) ``` deep= Tom Dick And Very Naughy Harry Tibilalis posterior (inverts and plantarflexes foot) D- flexor digitorum longus Artery (post tib) Vein Nerve (post tibilal) H- fletxor hallcus longus ``` popliteus - pretty superior, wwraps from medial femur to lateral soleus. action= laterally rotates femur on tibia - 'unlock' knee joint, counts as deep
50
ligaments attached to patella (2)
superior-- quadriceps femoris tendon | inferior-- patella tendon/ligament (called both, is acc a ligament)
51
anterior arm veins
Carry My Blood (blood flow direction) lateral- cephalic, cephalic middle- median, median cubital medial- brachial, basilic
52
intervertebral joints - what type of joint - made from - circle stuff
- secondary - hyaline, fibrous, hyaline - nucleus pulposus (soft core) surrounded by concentric rings of annulus fibrosis