Fascia of Palm Flashcards

1
Q

The palmar aspect of the hand features a central concavity that separates into two eminences. What are they?

A
  1. Thenar

2. Hypothenar

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2
Q

Thenar Eminence

A

lateral, more prominent, at the base of the thumb.

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3
Q

Hypothenar Eminence

A

medial, smaller, proximal to the base of the 5th finger.

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4
Q

The fascia of the palm is continuous with what?

A

The antebrachial fascia and the fascia of the dorsum of the hand.

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5
Q

Where on the hand is the fascia thin?

A

Over the thenar and hypothenar eminences.

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6
Q

Where on the hand is the fascia thick?

A

Centrally, where it forms the fibrous palmar aponeurosis and in the fingers where it forms the digital sheaths.

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7
Q

Describe the palmar aponeurosis

A

a strong, well defined part of the deep fascia of the palm.

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8
Q

What does the palmar aponeurosis form?

A

four longitudinal digital bands

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9
Q

What does the palmar aponeurosis cover and overly?

A

the soft tissues and overlies the long flexor tendons.

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10
Q

Where does the palmar aponeurosis begin?

A

radiates from the apex of the hand

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11
Q

Where does the palmar aponeurosis end?

A

attach distally to the bases of the proximal phalanges

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12
Q

What does the palmar aponeurosis turn into at the bases of the phalanges?

A

where they become continuous with the fibrous digital sheath.

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13
Q

What are the fibrous digital sheaths?

A

ligamentous tubes that enclose the flexor tendons and the synovial sheaths that surround them as they pass along the palmar aspect of their respective digit.

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14
Q

Where does the medial fibrous septum extend?

A

extends deeply from the medial border of the palmar aponeurosis to the 5th metacarpal.

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15
Q

What is medial to the medial fibrous septum?

A

The medial or hypothenar compartment

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16
Q

What does the hypothenar compartment contain (broad)?

A

the hypothenar muscles

17
Q

Where does the lateral fibrous septum extend?

A

extends deeply from the lateral border of the palmar aponeurosis to the 3rd metacarpal.

18
Q

What is lateral to the lateral fibrous septum?

A

the lateral or thenar compartment

19
Q

What does the thenar compartment contain (broad)?

A

the thenar muscles

20
Q

What is located between the hypothenar and the thenar compartment?

A

The Central Compartment

21
Q

What does the central compartment contain (broad)?

A
  1. flexor tendons and their sheath
  2. lubrical muscles
  3. superficial palmar arterial arch, and
  4. digital vessels and nerves.
22
Q

What is the deepest muscular plane of the palm?

A

The Adductor Compartment

23
Q

What does the Adductor Compartment contain?

A

The Adductor Pollicis

24
Q

What are the two potential spaces between the flexor tendons and the fascia covering the deep palmar muscles?

A
  1. Thenar Space

2. Midpalmar Space

25
Q

What is between the thenar and midpalmar spaces?

A

Lateral fibrous septum

26
Q

Describe the Lateral Fibrous Septum

A

especially strong, attached to the 3rd metacarpal.

27
Q

What is the Midpalmar space continuous with?

A

anterior compartment of the forearm via the carpal tunnel.

28
Q

What is the apex of the palmar aponeurosis continuous with?

A

the flexor retinaculum and the palmaris longus tendon.