Back Bones/Muscles

Question 1

posterior rami innervate what 3 things?

Answer 1

facet joints
deep back muscles
overlying skin

Question 2

When are erectors turned off?

Answer 2

full flexion

Question 3

what is an angiosome?

Answer 3

vascular territory

Question 4

2 types of back pain:

Answer 4

neurogenic:
compressive: discs, stenosis

Question 5

why is spine common place for metastasis?

Answer 5

veins that drain have no valves

Question 6

which muscles are good at long sustained contractions without fatigue?

Answer 6

smooth muscle

Question 7

shape of smooth muscle?

Answer 7

spindle shaped

Question 8

2 kinds of striated

Answer 8

skeletal-network

cardiac - giant cells

Question 9

where are the nuclei in skeletal vs. cardiac vs. smooth?

Answer 9

peripheral
central
central

Question 10

how to get Ca2+ into muscle cells?

Answer 10

via T-tubules in sarcoplasmic reticulum

Question 11

what joins cardiac cells together?

Answer 11

intercalated discs
fascia adherens for myofibrils
desmosomes to reinforce

Question 12

Gap junctions in cardiac cells are oriented?

Answer 12

longitudinally