MUSCLE Flashcards

1
Q

Where does a muscle insert into a bone

A

The fibres of a tendon at the either end of a muscle are embedded into the periosteum of the bone.

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2
Q

Why is it important that the tendon is strongly anchored

A

To spread the force of contraction

To ensure the tendon wont tear away

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3
Q

What is an aponeurosis

A

Flat thin and broad muscle tendons

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4
Q

Where are aponeurosis found?

A

Anterior tendons of abdominal muscles

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5
Q

How many joints are crossed by the biceps brachii muscle

A

3

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6
Q

How many joints does the pectoralis major muscle cross

A

1

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7
Q

What joints does the bicep brachii muscle cross

A

The shoulder
The elbow
The superior radio-ulnar

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8
Q

What joints does the pectoralis major muscle cross

A

Shoulder

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9
Q

What innervates skeletal muscle

A

Motor nerves

Branchial nerves

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10
Q

What are branchial nerves

A

Special visceral efferent fibers (SVE) are the efferent nerve fibers that provide motor innervation to the muscles of the pharyngeal arches in humans, and the branchial arches in fish. Some sources prefer the term “branchiomotor” or “branchial efferent”.

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11
Q

Where is cardiac muscle location

A

In the heart

In some large vessels that join to the heart

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12
Q

What inervates cardiac muscle

A

Visceral motor nerves

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13
Q

What innervates smooth muscle

A

Visceral motor nerves

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14
Q

Where is smooth muscle found

A
Tunica media 
Hair follicles 
The eyeball 
gastrointestinal walls 
respiratory walls
urogenital
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15
Q

Describe a tendon

A

A non-fleshy, dense regular connective tissue at the end of the muscle

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16
Q

What is special about the diaphragm (tendon wise)

A

Its tendon is located in the centre of the muscle

‘the central tendon’

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17
Q

What direction does the diaphragm move on contraction

A

descend

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18
Q

What makes up the deltoid muscle

A

Anterior, middle and posterior

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19
Q

What movement is the middle fibre of the deltoid responsible for

A

abduction

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20
Q

What movement is the anterior fibre of the deltoid responsible for

A

flexion

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21
Q

What movement is the posterior fibre of the deltoid responsible for

A

extension

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22
Q

What do you call a pair of muscles who contract/relax oppositely and simultaneously

A

An antagonistic pair

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23
Q

What do you call muscles that help perform the same set of joint movements as the agonists.

A

Synergists

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24
Q

What does a synergist help with

A

It helps control the movement so that it falls within a range of motion which is safe and desirable.

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25
What is a fixator/stabilising muscle
A muscle whos primary act is to stablize the joint to which they are attached. They reduce the risk of dislocation at the joint
26
Where are fixator/stabilising muscles usually found
Hip and shoulder joints
27
What are the stabilising muscles at the shoulder called
Rotator cuff
28
How are muscles generally compartmentalised (x3)
Deep fascial intermuscular septa (which separate them into their compartments Common nerves supplying all the muscles in the compartment Common actions of the muscles within the compartment
29
What is useful about knowing the arrangement of the deep fascia and partitioning structures of muscles
Helps clinicians to track infection spread
30
Where do the inter muscular septa extend from
The periosteum
31
What is an aponeurosis
Flat, thin and broad tendon
32
What is an example of an aponeurosis found
Connecting Abdominal oblique muscles
33
Describe what happens at the extension of a joint
The bones composing a joint move further away from each other
34
How many joints does the biceps brachii cross?
3
35
How many joints do the triceps cross?
2
36
How many joints does the brachioradialis cross?
2
37
What are skeletal muscles called that cross the median sagital plane (go from one side of the body to the other)
Diaphragm
38
How many Diaphragms are there in the body
4
39
What shape is the deltoid muscle
fan shaped
40
Where is the deltoid muscle located
Shoulder
41
How many parts does the deltoid muscle have?
3
42
What is an example of a synergist muscle
Rotator cuff muscle
43
What is the function of the rotator cuff muscles?
They stabilise the shoulder joint during its movements | They fix the shoulder joint in a stationary position when only movement at the elbow joint is required.
44
Where does the tendon of the quadricep connect to the knee?
Anteriorly
45
What plexus supplies the individual nerves to each muscle compartment in the arm
Brachial plexus
46
What plexus supplies the individual nerves to each muscle compartment in the leg
Lumbosacral plexus
47
What spinal region do the brachial plexus nerves originate from?
Cervical region (neck)
48
What spinal nerve roots do the brachial plexus nerves originate from?
C5-T1
49
What spinal nerve roots do the lumbosacral plexus nerves originate from?
L1-S4
50
What can damage to a plexus cause
Paralysis and deformities in innervated extremities
51
How many muscles are in human body (roughly)
600-700
52
Where are the internal and external oblique muscles located
Abdominal wall
53
What is structurally significant about the oblique muscles
They are directed approximately 90 degrees to each other
54
What direction do the rectus abdominis muscles travel?
Vertically
55
Where is the serratus anterior muscle found
Anterior of ribs
56
What does 'rectus' mean anatomically
Straight
57
What does 'ceps' mean anatomically
Heads
58
What does 'teres' mean anatomically
Round and smooth or cylindrical
59
Do sphincters have smooth muscle or skeletal muscle?
Some have both
60
What are examples of sphincters with skeletal muscle control
external anal sphincter | external urethral sphincter
61
What two bones does the sternocleidomastoid muscle attach
Clavical | Mastoid
62
What imaging technique is best used for investigating muscles
MRI