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Question 1

Describe the compartments of the palm.

Answer 1

The palm contains the thenar compartment (thenar muscles), hypothenar compartment (hypothenar muscles), central compartment (flexor tendons, lumbricals, (SPAA) superficial palmar arterial arch), and adductor compartment (adductor pollicis). Two potential spaces, the thenar and midpalmar spaces, lie between these compartments.

Question 2

What muscles are located in the thenar compartment, and what is their function?

Answer 2

The thenar compartment contains the

1. (APB) abductor pollicis brevis
2. (FPB) flexor pollicis brevis
3. opponens pollicis.

These muscles form the thenar eminence and are essential for thumb opposition.

Question 3

Which muscle is located in the adductor compartment?

Answer 3

The adductor compartment contains the adductor pollicis.

Question 4

What muscles are found in the hypothenar compartment?

Answer 4

The hypothenar compartment includes the

1. (ADM) abductor digiti minimi
2. (FDMB) flexor digiti minimi brevis
3. (ODM) opponens digiti minimi.

Question 5

Where are the lumbricals located, and what is their function?

Answer 5

The lumbricals are short muscles located in the central compartment along with the long flexor tendons, and they aid in finger flexion and extension