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Middle Phalanx of Second Toe
Skeletal System

Middle Phalanx of Second Toe

Phalanx media digiti secundi pedis

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Quick Facts

Location: Foot.

Bone Type: Long bone.

Key Features: Head, body, base, and proximal and distal articular facets.

Articulates With: Proximal phalanx of second toe, distal phalanx of second toe.

Arterial Supply: Dorsal digital arteries of foot; proper plantar digital arteries.

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Key Features & Anatomical Relations

The middle (intermediate) phalanx of second toe is one of the fourteen phalangeal bones of the foot. It is classified as a long bone and includes the following bony features:

- parts: head, body, and base;

- landmarks: proximal and distal articular facets.

More information regarding these bony features can be found in the Parts and Landmarks tabs for this bone.

The middle phalanx is located:

- distal to the proximal phalanx;

- proximal to the distal phalanx.

It articulates with the:

- proximal phalanx at the proximal interphalangeal joint;

- distal phalanx at the distal interphalangeal joint.

Ossification

Ossification of the middle phalanx occurs at two ossification centers, these are found in the:

- body, which appears in utero during the third to eighth months;

- base, which appears within the second to eighth years.

These ossification centers fuse with each other by the 18th year (Standring, 2016).

Surface Anatomy

The head, body, and base of the middle phalanx can all be easily palpated.

List of Clinical Correlates

- Fracture - Brachyphalangia - Symphalangia

References

Standring, S. (2016) Gray's Anatomy: The Anatomical Basis of Clinical Practice. Gray's Anatomy Series 41st edn.: Elsevier Limited.

Learn more about this topic from other Elsevier products

Middle Phalanx

ScienceDirect image

For the middle phalanx, the fracture is exposed through a direct dorsal longitudinal incision, and the lateral slips of the extensor tendon are mobilized by incising the triangular ligament in the midline and extending distally by splitting the tendon in the midline to its insertion into the distal phalanx.

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