system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Marginal mandibular branch of facial nerve lies in:
assistant
The correct answer is  Branches and Distribution of facial nerve:
Within the facial canal

Greater petrosal nerve
The nerve to the stapedius
The chorda tympani

At its exit from the stylomastoid foramen

Posterior auricular
Digastric
Stylohyoid

Terminal branches within the parotid gland

Temporal
Zygomatic
Buccal
Marginal mandibular
Cervical

Key Concept: 
The marginal mandibular branch of the facial nerve is found superﬁcial to the facial artery and  (anterior) facial vein. Thus, the facial artery can be used as an important landmark in locating the  marginal mandibular nerve during surgical procedures.