Swing Type and Batting Grip Affect Peak Pressures on the Hook of Hamate in Collegiate Baseball Players.

Background: Bat swing and grip type may contribute to hook of hamate fractures in baseball players.

Purpose: To compare the effects of swing type and batting grip on the pressure and rate of pressure development over the hook of hamate in collegiate baseball players.

Study Design: Descriptive laboratory study.

Quadrilateral space syndrome: a review.

Quadrilateral space (QS) syndrome (QSS) is a relatively rare condition in which the axillary nerve and the posterior humeral circumflex artery are compressed within the QS. Fibrous bands are most commonly implicated as the cause, with true space-occupying lesions being less common. QSS is characterized by poorly localized shoulder pain and paresthesia over the lateral aspect of the shoulder and arm in a nondermatomal pattern.