What are the key bony landmarks on the palmar aspect of the hand?

The main bony landmarks include the tubercle of scaphoid at the base of the thenar eminence, the crest of trapezium just lateral to it, the pisiform bone at the base of the hypothenar eminence, and the hook of hamate one finger's breadth distal to the pisiform.

How is the skin on the palm adapted for its function?

The palmar skin is thick to resist friction, contains sweat glands but no hair or sebaceous glands, and is firmly attached to the underlying palmar aponeurosis, making it immobile. It also has ridges and creases that aid in grip and traction.

What are the main types of flexion creases in the palm?

The palm has three groups of flexion creases: wrist creases (proximal and distal), palmar creases (e.g., radial longitudinal, midpalmar longitudinal, distal transverse, proximal transverse), and digital creases (proximal, middle, distal).

What are fingerprints and why are they important?

Fingerprints are friction ridges on finger pads that enhance grip. They are unique to each individual and are used in forensics for personal identification and criminal investigations.

What is a Simian crease and what does it indicate?

A Simian crease is a single transverse palmar crease that is commonly associated with conditions like Down syndrome.

How do the flexion creases relate to underlying anatomical structures?

Flexion creases correspond to joint locations and functional movements. For example, the distal wrist crease lies over the proximal border of the flexor retinaculum, and digital creases align with interphalangeal joints.

Palmar Hand Anatomy – Surface Landmarks & Creases