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Anatomy > Exam 2- Upper Limb > Flashcards

Exam 2- Upper Limb Flashcards

(70 cards)

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1
Q

The Hand Consists of…

A

Carpals, Metacarpals, Phalanges, Muscles, Fascia, Tendons, and Nerves and Vessels.

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2
Q

Flexor Creases

A

Mark Joints, Attachment points to deep fascia

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3
Q

PAD and DAB

A

Palmar ADducts and Dorsal ABducts

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4
Q

4 Layers of the Palm

A

1: Fascia (Palmar Aponeurosis, Flexor Retinacula, and Septa)
2: The short muscles of the thumb and digit 5 (for position adjustmaents and fine movement) and short muscles of the hand
3: The long flexor tendons (power for grip)
4. Adductor of the thumb and deep muscles.

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5
Q

Dupuytren Contraction

A

Disease with Palmar Fascia
Results in progressive shortening, thickening, and fibrosis of the palmar fascia and aponeurosis
This pulls the 4th and 5th fingers into partial flexion.
Treatment usually involves surgical exision of all fibrotic parts of the palmar fascia to free fingers.

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6
Q

Annular and Cruciform Parts

A

This is what ligaments are composed of
They prevent bowstringing
Run around the synovial sheath which is around the flexor digitorum superficialis and profundus
Annular is larger and runs more proximal.

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7
Q

Lumbricals

A

Originate from gaps in the profundus and insert with the lateral cord from the extensor hood.

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8
Q

Flexor Retinaculum

A

Forms the Carpal Tunnel

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9
Q

Tendons that pass through the carpal tunnel

A 
Flexor Digitorum Superficialis Tendons
Flexor Digitorum Profundus Tendons
Flexor Pollicis Longus Tendon
Flexor Carpi Radialis Tendon
Median Nerve
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10
Q

Ulnar Bursa

A

The synovial sheath containing the long flexor tendons

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11
Q

Midpalmar Space

A

This space is continuous with the anterior compartment of the arm through the carpal tunnel
This is clinically significant because the spaces of the hand may become infected and consequently become distended with pus

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12
Q

Spaces in the Hand

A

Midpalmar Space (Pinky side and between middle and index) and Thenar Space (Thumb side and some index)

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13
Q

OAF

A

Opponens, Abductor, and Flexor
Thenar- Pollicis- Innervated by Recurrent Median Nerve
Hypothenar- Digiti Mini- Innervated by Deep Branch of Ulnar

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14
Q

Radial Nerve

A

Innervates posterior side of arm, forearm, and hand

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15
Q

Median Nerve

A

Innervates most of the anterior forearm and 5 muscles of the hands
Innervates most of the flexor muscles in the forearm, the thenar muscles, and the two lateral lumbrical muscles that move the index and middle fingers
Ulnar affects flexor carpi ulnaris and medial half of flexor digitorum profundus… Median is the rest

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16
Q

Ulnar Nerve

A

Innervates a little of the anterior forearm and most of the hands (especially palmar)
Only forearm muscles it innervates are Flexor Carpi Ulnaris and Flexor Digitorum Profundis

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17
Q

Arteries for the Lumbricals

A

Superficial Palmar Arch, Common Palmar Digital Arteries, Deep Palmar Arch, and Dorsal Digital Artery

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18
Q

Laceration of the Hypothenar Eminence

A

Weakness in pinky during opposition and tingling in 4th and 5th and medial palm.
Ulnar Nerve is damaged

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19
Q

Blood Supply to the Hand

A

There is a very vast blood supply to the hand

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20
Q

Arteries Contributing to the Superficial Palmar Arch and Deep Palmar Arch
Be able to label the arches, the common palmer digital artery, the proper palmer digital, artery and the deep branch of ulnar artery and princeps pollicis artery

A

Superficial Palmar Arch is a direct continuation of Ulnar Artery (some radial)
Deep Palmar Arch is a direct continuation of Radial Artery (some ulnar)
Page 781 of Moore
Radial Artery splits into Deep Palmar Arch and Princeps Pollicis.

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21
Q

Lymphatics of the Hand

A

They all drain into one lymph node in the cubital fossa causing tenderness on the medial side

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22
Q

Infection of the Hand

A

Swells dorsally
Potential spaces may become infected and pus accumulates (hypothenar, thenar, adductor) or spead (midpalmar to proximal forearm)

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23
Q

Radial Nerve Injury effect on Hand

A

Wrist Drop (due to extensor paralysis) anesthesia on hand is limited to dorsum

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24
Q

Ulnar Nerve Injury effect on Hand

A

Compression at Ulnar Canal (Guyon tunnel) by pisohamate ligament (Handlebar Neuropathy)

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25
Carpal Tunnel Syndrome
Caused by compression of the median nerve in the carpal tunnel Manifests as weakness and wasting of thenar muscles, and loss of opposition of the thumb. Anesthesia of over 3.5 digtis thumb side Causes a depression the appearat base of thumb. Treated by cutting the flexor retinaculum
26
Position of Rest
Where all of the joints have the least amount of tension | This comes from Muscle Tone
27
Sternoclavicular Joint (SC Joint)
Attaches appendicular to axial Ball and socket between the Sternum and Clavicle Articular Disc serves two functions: Shock Absorption and prevents Medial Displacement Very difficult to dislocate. The ligaments are the Anterior and Posterior sternoclavicular ligaments reinforcing the joint capsule, the interclavicular ligament, and the costoclavicular ligament anchoring the clavicle.
28
Acromioclavicular Joint (AC Joint)
Clavicle and Scapula This is the least likely to be dislocated Main articulation that suspends upper extremity from trunk Functions: Allows scapula additional ROM and forces to transmit from upper extremity to clavicle Separated Shoulder is AC Joint Has 4 Ligaments: Acromioclavicular, Coracoacromial, and Coracoclavicular- Trapezoid and Conoid (These last two cause the shoulder separation)
29
Glenohumeral Joint
Main Shoulder Joint from the Humerus and Glenoid Fossa Greatest ROM in the body at the cost of stability Dislocated Shoulder is Glenohumeral Joint (and this is the most dislocated joint) Inferior Ligament is the one most likely to fail SIT are the main muscles for reinforcement Has 3 Ligaments: Coracohumeral, Transverse Humeral, and lots of Capsular Ligaments (main source of stability) (split into superior, middle, and inferior) Scapulothoracic Articulation begins rotation when the humerus is abducted 30 degrees Scapulohumeral Rhythm- 2:1 ratio of humerus movementto scapula movement
30
Elbow Joint
``` 3 Articulations and 2 Joints Gliding Joint (Capitulum and Radius)- Functional Hinge Proximal Radioulnar Joint- Pivot Joint Trochlea and Ulna- Typical Hinge Motion Joint Capsule surrounds all 3 articulations Main ligaments: Radial (Lateral) Collateral Ligament, Ulnar (Medial) Collateral Ligament (breaks down into Anterior, Posterior, and Oblique Bands), and Anular (Lateral) Ligament (holds radial head in ulnar notch) ```
31
Proximal and Distal Radioulnar Joints
Pronation and Supination Proximal- Proximal radial notch is the pivot Distal- Ulnar notch of the radius is the pivot point Interosseus membrane runs between- Tightens when radius is pushed proximally and in supination and loose in pronation Pronate- Palm Down Supinate- Palm Up
32
Wrist (Radiocarpal) Joint (RC Joint)
Ulnar has nothing to do with it Lunate and Scaphoid articulate with the radius Reinforced by palmar, dorsal, radial collateral, and ulnar collateral ligaments Permits flexion/extension, and adduction/abduction
33
Intercarpal (Midcarpal) Joints
Between proximal and distal rows of the carpis (excluding pisiform) Responsible for most flexion of the hand 3 articulations: Lateral (radial) part, Central (ball and socket), and Ulnar part Scaphoid, Lunate, and Triquetrum are the most frequently fractured
34
Carpometacarpal Joints (CM Joints)
They are plane articulations The thumb CM Joint is freely movable, saddle articulation No motion for digits 2 and 3, Limited for 4, and more mobile for 5
35
Metacarpophalangeal Joint (MP)
The base for all of the fingers Can flex/extend and adduct/abduct. Some opposition occurs at digit 5
36
``` Interphalangeal Joint (IP) DIP/PIP ```
``` IP is technically only the thumb Movements are flexion and extension Synovial Joint capsule reinforced by collateral ligatments Distal Interphalangeal Joint Proximal Interphalangeal Joint ```
37
Power Grip
The most energy "expensive" hand action | Medial, Ulnar, Radial, and maybe Musculocutaneous Nerves all effect this
38
Actions of the Hand
Power Grip- Forcing digits against the palm around an object with opposing force from the thumb Hook Grip- Carrying a briefcase/bag with handle. Mainly the long digit flexors Precision Grip- fine control from intrinsic hand muscles like holding a pencil Pinching- Compression between thumb and index finger
39
De Quervain's Tenosynovitis
Inflammation, swelling, and irritation in tendons from thumb to wrist Painful to turn wrist, grasp, and make a fist Can cause pain in the forearm Involves Extensor Pollicis Brevis and Abductor Pollicis Longus Tendons
40
Lateral Epicondylitis
"Tennis Elbow" Overuse syndrome of the common extensor tendon Gradual Symptoms develop Involves Extensor Carpi Radialis Brevis, Extensor Carpi Ulnaris, and Extensor Digitorum
41
Medial Epicondylitis
"Golfer's Elbow" Overuse syndrome of the common flexor tendon Involves Pronator Teres, Flexor Carpi Radialis, Palmaris Longus, Flexor Digitorum Superficialis, and Flexor Carpi Ulnaris
42
Pronator Teres Syndrome
Compression of the Median Nerve that runs between the 2 heads of the Pronator Teres Tingling or nukbness in the palm, thumb, and fingers (minus pinky)
43
Frozen Shoulder
Pain and stiffness in the shoulder joint resulting in a loss in ROM
44
Erb-Duchenne
Injury to the superior brachial plexus Results in "waiters tip" position because C5-C6 innervates flexors of the arm and a primary supinator of the arm and C7-C8 innervate extensors
45
Musculocutaneous Nerve
``` Mixed Nerve (Motor and Sensory Nerves) As it courses distally it becomes primarily cutaneous ```
46
Median Nerve
If the Brachial Plexus is injured at all, the median nerve will always be affected
47
Posterior Cord
The posterior cord is about the same size as the other two put together
48
Flexor Carpi Ulnaris
Tendon guides Ulnar nerve and artery
49
Palmaris Longus
Missing in 14% of people To test, oppose thumb and pinky and flex wrist in order to palpate Inserted in distal half of flexor retinaculum
50
Flexor Digitorum Superficialis
Piano Playing Muscle
51
Hand of Benediction
Median Nerve is injured at the Elbow | Can't flex digits 1-3
52
Ulnar Claw
Ulnar Canal Syndrome Causes "clawing" of the 4th and 5th fingers (hyperextension at the metacarpophalangeal joint with flexion at the PIP) Their ability to flex is unaffected
53
Handlebar Neuropathy
Riding a bike and puts pressure on the hooks of their hamates, which compresses their ulnar nerves Results in sensory loss on the medial side of the hand, and weakness of the intrinsic hand muscles
54
``` Off-Shoot Nerves of the Brachial Plexus Dorsal Scapular Long Thoracic Suprascapular Nerve to Subclavius Lateral Pectoral Nerve Upper Subscapular Nerve Middle Subscapular Nerve (Thoracodorsal Nerve) Lower Subscapular Nerve Medial Pectoral Nerve Medial Cutaneous Nerve to Arm Medial Cutaneous Nerve to Forearm Axillary Musculocutaneous Median Radial Ulnar ```
- Dorsal Scapular- Rhomboids and Levator Scapulae - Long Thoracic- Serratus Anterior - Suprascapular- Supraspinatus and Infraspinatus - Nerve to Subclavius- Subclavius - Lateral Pectoral Nerve- Pectoralis Major - Upper Subscapular Nerve- Subscapularis - Middle Subscapular Nerve (Thoracodorsal Nerve)- Latissimus Dorsi - Lower Subscapular Nerve- Subscapularis and Teres Major muscles - Medial Pectoral Nerve- Pectoralis Major and Minor - Medial Cutaneous Nerve to Arm- Skin of the Arm - Medial Cutaneous Nerve to Forearm- Skin of Forearm - Axillary- Teres Minor and Deltoid - Musculocutaneous- Biceps Brachii, Coracobrachial, and Brachialis - Median- Innervates most of the flexor muscles in the forearm, the thenar muscles, and the two lateral lumbrical muscles that move the index and middle fingers - Radial- Innervates the triceps brachii, and the extensor muscles in the posterior compartment of the forearm - Ulnar- Innervates the muscles of the hand (apart from the thenar muscles and two lateral lumbricals), flexor carpi ulnaris and medial half of flexor digitorum profundus
55
Klumpke Palsy
A lower brachial plexus injury results from excessive abduction of the arm (e.g person catching a branch as they fall from a tree) Nerves affected: Ulna and Median nerves. Muscles paralyzed: All the small muscles of the hand Sensory functions: Loss of sensation along medial side of arm. The metacarpophalangeal joints are hyperextended, and the interphalangeal joints are flexed. This gives the hand a clawed appearance.
56
Know the Pathway of the Arteries
SEE PICTURE
57
Radial Groove
Radial Nerve and Deep Branch of Brachial Artery course through it together.
58
Snuff Box
Radial Artery and Radial Nerve in snuff box floor Ulnar (medial) border: Tendon of the extensor pollicis longus. Radial (lateral) border: Tendons of the abductor pollicis longus and extensor pollicis brevis. Proximal border: Styloid process of the radius. Floor: scaphoid and trapezium.
59
Quadrangular Space
Axillary and Posterior Circumflex Humeral Artery course through it
60
Know the Palmar Arches and the arteries that contribute to it. Also be able to label a picture of it (Arches, Common Palmer Digital Artery, Proper Palmer Digital Artery, Artery and the Deep Branch of Ulnar Artery, and Princeps Pollicis Artery)
STUDY PICTURE Pages 435 and 453 of Atlas Page 781 of Moore
61
Nerve and Artery Together
Ulnar Nerve runs with the Superior Ulnar Collateral Artery
62
Nursemaid's Elbow
Also known as Babysitter's Elbow Nursemaid's elbow is a common injury of early childhood. It is sometimes referred to as "pulled elbow" because it occurs when a child's elbow is pulled and partially dislocates. The medical term for the injury is "radial head subluxation." Nursemaid's elbow occurs when there is a partial separation of the radiocapitellar joint. Because a young child's ligaments are not fully formed, even a mild force on the joint may cause it to shift, or partially dislocate. The annular ligament surrounds the radius and may be particularly loose in some young children, which may lead to nursemaid's elbow recurring over and over again.
63
General Drainage of Lymph of Upper Limb
Right side drains to the Lymphatic Duct | Everything else drains into the Thoracic Duct
64
Scaphoid
The most frequently fractured carpal bone
65
Extensor Retinaculum
Function?
66
General Digit Formula for Fingers
Order of length in most people Digits 3,4,2,5,1 is in men. In women, 2 may be the same length as 4. THere are also times tat it's longer.
67
General Digit Formula for Fingers
Order of length in most people Digits 3,4,2,5,1 is in men. In women, 2 may be the same length as 4. THere are also times tat it's longer.
68
Flexor Retinaculum and Extensor Retinaculum
Prevents Bowstringing of the Flexor Muscles and Extensor Muscles
69
Branches of Radial Nerve
Once the deep branch of the radial nerve leaves/pierces the supination, it becomes the posterior interosseus
70
Most superficial Muscles/Tendons in the Wrist
Flexor Carpi Ulnaris, FLexor Carpi Radialis, and Palmaris Longus

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