What is a common neurological effect of Klumpke's paralysis?

Klumpke's paralysis occurs due to injury to the lower trunk of the brachial plexus, specifically involvement of the C8 and T1 nerve roots. A common neurological manifestation associated with this condition is Horner's syndrome. This occurs because the sympathetic fibers that innervate the eye and are responsible for pupil dilation and other functions travel through the same area as the lower trunk of the brachial plexus. When this area is damaged, it can disrupt the sympathetic nerve supply to the eye, leading to symptoms such as ptosis (drooping of the eyelid), miosis (constricted pupil), and anhidrosis (lack of sweating) on the affected side of the face.

The other options mentioned, while they may be relevant to different neurological conditions, do not specifically correlate with Klumpke's paralysis. Loss of the biceps reflex tends to be associated with an upper trunk lesion of the brachial plexus affecting the C5-C6 roots. The absent patellar reflex is linked to the lumbar plexus and lower motor neuron conditions affecting the L2-L4 nerve roots, and weakness in neck extension is more related to upper motor neuron lesions affecting the cervical spine or brainstem, not specifically Klumpke's